diff --git a/src/Sarif.Multitool/Rules/RuleResources.Designer.cs b/src/Sarif.Multitool/Rules/RuleResources.Designer.cs
index dbb6dd390..fd0d86a94 100644
--- a/src/Sarif.Multitool/Rules/RuleResources.Designer.cs
+++ b/src/Sarif.Multitool/Rules/RuleResources.Designer.cs
@@ -636,7 +636,7 @@ internal static string SARIF2011_ProvideContextRegion_FullDescription_Text {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to Placeholder_SARIF2011_ProvideContextRegion_Note_Default_Text.
+        ///   Looks up a localized string similar to {0}: Placeholder.
         /// </summary>
         internal static string SARIF2011_ProvideContextRegion_Note_Default_Text {
             get {
diff --git a/src/Sarif.Multitool/Rules/RuleResources.resx b/src/Sarif.Multitool/Rules/RuleResources.resx
index b204530bb..9f3df8cd5 100644
--- a/src/Sarif.Multitool/Rules/RuleResources.resx
+++ b/src/Sarif.Multitool/Rules/RuleResources.resx
@@ -320,7 +320,7 @@ Many tool use similar names for 'uriBaseId' symbols. We suggest 'REPOROOT' for t
     <value>Placeholder_SARIF2011_ProvideContextRegion_FullDescription_Text</value>
   </data>
   <data name="SARIF2011_ProvideContextRegion_Note_Default_Text" xml:space="preserve">
-    <value>Placeholder_SARIF2011_ProvideContextRegion_Note_Default_Text</value>
+    <value>{0}: Placeholder</value>
   </data>
   <data name="SARIF1012_MessageArgumentsMustBeConsistentWithRule_Error_MessageIdMustExist_Text" xml:space="preserve">
     <value>{0}: Placeholder '{1}' '{2}'</value>
diff --git a/src/Sarif.Multitool/Rules/SARIF2011.ProvideContextRegion.cs b/src/Sarif.Multitool/Rules/SARIF2011.ProvideContextRegion.cs
new file mode 100644
index 000000000..114864383
--- /dev/null
+++ b/src/Sarif.Multitool/Rules/SARIF2011.ProvideContextRegion.cs
@@ -0,0 +1,56 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System.Collections.Generic;
+
+using Microsoft.Json.Pointer;
+
+namespace Microsoft.CodeAnalysis.Sarif.Multitool.Rules
+{
+    public class ProvideContextRegion : SarifValidationSkimmerBase
+    {
+        /// <summary>
+        /// SARIF2011
+        /// </summary>
+        public override string Id => RuleId.ProvideContextRegion;
+
+        /// <summary>
+        /// Placeholder
+        /// </summary>
+        public override MultiformatMessageString FullDescription => new MultiformatMessageString { Text = RuleResources.SARIF2011_ProvideContextRegion_FullDescription_Text };
+
+        protected override IEnumerable<string> MessageResourceNames => new string[] {
+            nameof(RuleResources.SARIF2011_ProvideContextRegion_Note_Default_Text)
+        };
+
+        public override FailureLevel DefaultLevel => FailureLevel.Note;
+
+        protected override void Analyze(Result result, string resultPointer)
+        {
+            if (result.Locations != null)
+            {
+                string locationsPointer = resultPointer.AtProperty(SarifPropertyName.Locations);
+                for (int i = 0; i < result.Locations.Count; i++)
+                {
+                    AnalyzeLocation(result.Locations[i], locationsPointer.AtIndex(i));
+                }
+            }
+        }
+
+        private void AnalyzeLocation(Location location, string locationPointer)
+        {
+            if (location.PhysicalLocation?.Region != null)
+            {
+                if (location.PhysicalLocation?.ContextRegion == null)
+                {
+                    string physicalLocationPointer = locationPointer.AtProperty(SarifPropertyName.PhysicalLocation);
+
+                    // {0}: Placeholder
+                    LogResult(
+                        physicalLocationPointer,
+                        nameof(RuleResources.SARIF2011_ProvideContextRegion_Note_Default_Text));
+                }
+            }
+        }
+    }
+}
diff --git a/src/Test.FunctionalTests.Sarif/Multitool/ValidateCommandTests.cs b/src/Test.FunctionalTests.Sarif/Multitool/ValidateCommandTests.cs
index 2e30db4ed..9d39b2685 100644
--- a/src/Test.FunctionalTests.Sarif/Multitool/ValidateCommandTests.cs
+++ b/src/Test.FunctionalTests.Sarif/Multitool/ValidateCommandTests.cs
@@ -224,6 +224,18 @@ public void SARIF2009_ConsiderConventionalIdentifierValues_Invalid()
                 MakeInvalidTestFileName(RuleId.ConsiderConventionalIdentifierValues, nameof(RuleId.ConsiderConventionalIdentifierValues)),
                 parameter: new TestParameters(verbose: true));
 
+        [Fact]
+        public void SARIF2011_ProvideContextRegion_Valid()
+            => RunTest(
+                MakeValidTestFileName(RuleId.ProvideContextRegion, nameof(RuleId.ProvideContextRegion)),
+                parameter: new TestParameters(verbose: true));
+
+        [Fact]
+        public void SARIF2011_ProvideContextRegion_Invalid()
+            => RunTest(
+                MakeInvalidTestFileName(RuleId.ProvideContextRegion, nameof(RuleId.ProvideContextRegion)),
+                parameter: new TestParameters(verbose: true));
+
         private const string ValidTestFileNameSuffix = "_Valid.sarif";
         private const string InvalidTestFileNameSuffix = "_Invalid.sarif";
 
diff --git a/src/Test.FunctionalTests.Sarif/TestData/Multitool/ValidateCommand/ExpectedOutputs/SARIF2011.ProvideContextRegion_Invalid.sarif b/src/Test.FunctionalTests.Sarif/TestData/Multitool/ValidateCommand/ExpectedOutputs/SARIF2011.ProvideContextRegion_Invalid.sarif
new file mode 100644
index 000000000..03864398d
--- /dev/null
+++ b/src/Test.FunctionalTests.Sarif/TestData/Multitool/ValidateCommand/ExpectedOutputs/SARIF2011.ProvideContextRegion_Invalid.sarif
@@ -0,0 +1,89 @@
+{
+  "$schema": "https://schemastore.azurewebsites.net/schemas/json/sarif-2.1.0-rtm.5.json",
+  "version": "2.1.0",
+  "runs": [
+    {
+      "tool": {
+        "driver": {
+          "name": "SARIF Functional Testing",
+          "rules": [
+            {
+              "id": "SARIF2011",
+              "name": "ProvideContextRegion",
+              "shortDescription": {
+                "text": "Placeholder_SARIF2011_ProvideContextRegion_FullDescription_Text."
+              },
+              "fullDescription": {
+                "text": "Placeholder_SARIF2011_ProvideContextRegion_FullDescription_Text"
+              },
+              "messageStrings": {
+                "Note_Default": {
+                  "text": "{0}: Placeholder"
+                }
+              },
+              "helpUri": "http://docs.oasis-open.org/sarif/sarif/v2.1.0/sarif-v2.1.0.html"
+            }
+          ]
+        }
+      },
+      "invocations": [
+        {
+          "toolConfigurationNotifications": [
+            {
+              "message": {
+                "text": "Rule 'SARIF2002' was explicitly disabled by the user. As result, this tool run cannot be used for compliance or other auditing processes that require a comprehensive analysis."
+              },
+              "descriptor": {
+                "id": "WRN999.RuleExplicitlyDisabled"
+              }
+            },
+            {
+              "message": {
+                "text": "Rule 'SARIF2006' was explicitly disabled by the user. As result, this tool run cannot be used for compliance or other auditing processes that require a comprehensive analysis."
+              },
+              "descriptor": {
+                "id": "WRN999.RuleExplicitlyDisabled"
+              }
+            }
+          ],
+          "executionSuccessful": true
+        }
+      ],
+      "artifacts": [
+        {
+          "location": {
+            "uri": "FunctionalTestOutput.ValidateCommand/Inputs.SARIF2011.ProvideContextRegion_Invalid.sarif",
+            "uriBaseId": "TEST_DIR"
+          }
+        }
+      ],
+      "results": [
+        {
+          "ruleId": "SARIF2011",
+          "ruleIndex": 0,
+          "level": "note",
+          "message": {
+            "id": "Note_Default",
+            "arguments": [
+              "runs[0].results[0].locations[0].physicalLocation"
+            ]
+          },
+          "locations": [
+            {
+              "physicalLocation": {
+                "artifactLocation": {
+                  "index": 0
+                },
+                "region": {
+                  "startLine": 26,
+                  "startColumn": 35
+                }
+              }
+            }
+          ]
+        }
+      ],
+      "columnKind": "utf16CodeUnits"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/src/Test.FunctionalTests.Sarif/TestData/Multitool/ValidateCommand/ExpectedOutputs/SARIF2011.ProvideContextRegion_Valid.sarif b/src/Test.FunctionalTests.Sarif/TestData/Multitool/ValidateCommand/ExpectedOutputs/SARIF2011.ProvideContextRegion_Valid.sarif
new file mode 100644
index 000000000..08d67563e
--- /dev/null
+++ b/src/Test.FunctionalTests.Sarif/TestData/Multitool/ValidateCommand/ExpectedOutputs/SARIF2011.ProvideContextRegion_Valid.sarif
@@ -0,0 +1,46 @@
+{
+  "$schema": "https://schemastore.azurewebsites.net/schemas/json/sarif-2.1.0-rtm.5.json",
+  "version": "2.1.0",
+  "runs": [
+    {
+      "tool": {
+        "driver": {
+          "name": "SARIF Functional Testing"
+        }
+      },
+      "invocations": [
+        {
+          "toolConfigurationNotifications": [
+            {
+              "message": {
+                "text": "Rule 'SARIF2002' was explicitly disabled by the user. As result, this tool run cannot be used for compliance or other auditing processes that require a comprehensive analysis."
+              },
+              "descriptor": {
+                "id": "WRN999.RuleExplicitlyDisabled"
+              }
+            },
+            {
+              "message": {
+                "text": "Rule 'SARIF2006' was explicitly disabled by the user. As result, this tool run cannot be used for compliance or other auditing processes that require a comprehensive analysis."
+              },
+              "descriptor": {
+                "id": "WRN999.RuleExplicitlyDisabled"
+              }
+            }
+          ],
+          "executionSuccessful": true
+        }
+      ],
+      "artifacts": [
+        {
+          "location": {
+            "uri": "FunctionalTestOutput.ValidateCommand/Inputs.SARIF2011.ProvideContextRegion_Valid.sarif",
+            "uriBaseId": "TEST_DIR"
+          }
+        }
+      ],
+      "results": [],
+      "columnKind": "utf16CodeUnits"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/src/Test.FunctionalTests.Sarif/TestData/Multitool/ValidateCommand/Inputs/SARIF2011.ProvideContextRegion_Invalid.sarif b/src/Test.FunctionalTests.Sarif/TestData/Multitool/ValidateCommand/Inputs/SARIF2011.ProvideContextRegion_Invalid.sarif
new file mode 100644
index 000000000..9dda72123
--- /dev/null
+++ b/src/Test.FunctionalTests.Sarif/TestData/Multitool/ValidateCommand/Inputs/SARIF2011.ProvideContextRegion_Invalid.sarif
@@ -0,0 +1,41 @@
+{
+  "$schema": "https://schemastore.azurewebsites.net/schemas/json/sarif-2.1.0-rtm.5.json",
+  "version": "2.1.0",
+  "runs": [
+    {
+      "tool": {
+        "driver": {
+          "name": "CodeScanner",
+          "version": "1.0"
+        }
+      },
+      "versionControlProvenance": [
+        {
+          "repositoryUri": "https://github.com/microsoft/sarif-sdk"
+        }
+      ],
+      "results": [
+        {
+          "ruleId": "TST0001",
+          "level": "error",
+          "message": {
+            "text": "Some testing occurred."
+          },
+          "locations": [
+            {
+              "physicalLocation": {
+                "artifactLocation": {
+                  "uri": "src/test.c"
+                },
+                "region": {
+                  "startLine": 3
+                }
+              }
+            }
+          ]
+        }
+      ],
+      "columnKind": "utf16CodeUnits"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/src/Test.FunctionalTests.Sarif/TestData/Multitool/ValidateCommand/Inputs/SARIF2011.ProvideContextRegion_Valid.sarif b/src/Test.FunctionalTests.Sarif/TestData/Multitool/ValidateCommand/Inputs/SARIF2011.ProvideContextRegion_Valid.sarif
new file mode 100644
index 000000000..53ebcac18
--- /dev/null
+++ b/src/Test.FunctionalTests.Sarif/TestData/Multitool/ValidateCommand/Inputs/SARIF2011.ProvideContextRegion_Valid.sarif
@@ -0,0 +1,45 @@
+{
+  "$schema": "https://schemastore.azurewebsites.net/schemas/json/sarif-2.1.0-rtm.5.json",
+  "version": "2.1.0",
+  "runs": [
+    {
+      "tool": {
+        "driver": {
+          "name": "CodeScanner",
+          "version": "1.0"
+        }
+      },
+      "versionControlProvenance": [
+        {
+          "repositoryUri": "https://github.com/microsoft/sarif-sdk"
+        }
+      ],
+      "results": [
+        {
+          "ruleId": "TST0001",
+          "level": "error",
+          "message": {
+            "text": "Some testing occurred."
+          },
+          "locations": [
+            {
+              "physicalLocation": {
+                "artifactLocation": {
+                  "uri": "src/test.c"
+                },
+                "region": {
+                  "startLine": 3
+                },
+                "contextRegion": {
+                  "startLine": 2,
+                  "endLine": 4
+                }
+              }
+            }
+          ]
+        }
+      ],
+      "columnKind": "utf16CodeUnits"
+    }
+  ]
+}
\ No newline at end of file