diff --git a/CHANGELOG.md b/CHANGELOG.md
index cafecff61a..d4d733e066 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ NOTE: This version bumps the Realm file format to version 11. It is not possible
 ### Fixed
 * Fixed a crash when calling `user.apiKeys.fetchAll()`. ([#3067](https://github.com/realm/realm-js/pull/3067))
 * Fixed calling `app.emailPasswordAuth.resetPassword` and `app.emailPasswordAuth.callResetPasswordFunction`, which would throw an error of mismatch in count of arguments. ([#3079](https://github.com/realm/realm-js/pull/3079))
+* realm.delete throws an exception `Argument to 'delete' must be a Realm object or a collection of Realm objects.` for schema objects defined with JS class syntax and not inheriting from RealmObject [2848](https://github.com/realm/realm-js/issues/2848).
 
 ### Compatibility
 * MongoDB Realm Cloud.
diff --git a/src/jsc/jsc_class.hpp b/src/jsc/jsc_class.hpp
index 36b5754cf8..a8b51c0368 100644
--- a/src/jsc/jsc_class.hpp
+++ b/src/jsc/jsc_class.hpp
@@ -600,6 +600,7 @@ bool ObjectWrap<ClassType>::has_instance(JSContextRef ctx, JSValueRef value) {
             return false;
         }
 
+        //search for RealmObjectClassConstructor on the prototype chain of the object
         JSObjectRef proto = try_get_prototype(ctx, object);
         while (proto != nullptr && !JSValueIsNull(ctx, proto)) {
             if (JSValueIsStrictEqual(ctx, proto, RealmObjectClassConstructorPrototype)) {
@@ -609,6 +610,14 @@ bool ObjectWrap<ClassType>::has_instance(JSContextRef ctx, JSValueRef value) {
             proto = try_get_prototype(ctx, proto);
         }
 
+        //handle RealmObjects using user defined ctors without extending RealmObject. 
+        //In this case we just check for existing internal value to identify RealmObject instances
+        auto internal = ObjectWrap<ClassType>::get_internal(ctx, object);
+        if (internal != nullptr) {
+            return true;
+        }
+
+        //if there is no RealmObjectClass on the prototype chain and the object does not have existing internal value then this is not an RealmObject instance
         return false;
     }
 
diff --git a/src/node/node_class.hpp b/src/node/node_class.hpp
index 1782a21cd4..f46b0bc547 100644
--- a/src/node/node_class.hpp
+++ b/src/node/node_class.hpp
@@ -490,6 +490,18 @@ inline bool WrappedObject<ClassType>::is_instance(Napi::Env env, const Napi::Obj
 		isInstanceOf = instance.InstanceOf(ctor);
 	}
 
+	//handle RealmObjects with user defined ctors without extending RealmObject
+	//In this case we just check for existing internal value to identify RealmObject instances
+	if (!isInstanceOf) {
+		bool isRealmObjectClass = std::is_same<ClassType, realm::js::RealmObjectClass<realm::node::Types>>::value;
+		if (isRealmObjectClass) {
+			Napi::External<typename ClassType::Internal> external = object.Get(ExternalSymbol).As<Napi::External<typename ClassType::Internal>>();
+			if (!external.IsUndefined()) {
+				return true;
+			}
+		}
+	}
+
 	return isInstanceOf;
 }
 
diff --git a/tests/js/realm-tests.js b/tests/js/realm-tests.js
index c96d377b86..134bbe304e 100644
--- a/tests/js/realm-tests.js
+++ b/tests/js/realm-tests.js
@@ -131,7 +131,7 @@ module.exports = {
         Object.setPrototypeOf(Car2, Realm.Object);
 
         //test class syntax support without extending Realm.Object
-        let car3ConstructorCalled = true;
+        let car3ConstructorCalled = false;
         class Car3 {
             constructor() {
                 car3ConstructorCalled = true;
@@ -155,7 +155,7 @@ module.exports = {
             TestCase.assertEqual(car.make, "Audi");
             TestCase.assertEqual(car.model, "A4");
             TestCase.assertEqual(car.kilometers, 24);
-            TestCase.assertTrue(car instanceof Realm.Object);
+            TestCase.assertInstanceOf(car, Realm.Object, "car not an instance of Realm.Object");
 
             let cars = realm.objects("Car");
             TestCase.assertUndefined(cars[""]);
@@ -163,7 +163,7 @@ module.exports = {
             TestCase.assertEqual(carZero.make, "Audi");
             TestCase.assertEqual(carZero.model, "A4");
             TestCase.assertEqual(carZero.kilometers, 24);
-            TestCase.assertTrue(carZero instanceof Realm.Object);
+            TestCase.assertInstanceOf(carZero, Realm.Object, "carZero not an instance of Realm.Object");
 
             constructorCalled = false;
             let car1 = realm.create('Car', { make: 'VW', model: 'Touareg', kilometers: 13 });
@@ -171,28 +171,27 @@ module.exports = {
             TestCase.assertEqual(car1.make, "VW");
             TestCase.assertEqual(car1.model, "Touareg");
             TestCase.assertEqual(car1.kilometers, 13);
-            TestCase.assertTrue(car1 instanceof Realm.Object);
+            TestCase.assertInstanceOf(car1, Realm.Object, "car1 not an instance of Realm.Object");
 
             let car2 = realm.create('Car2', { make: 'Audi', model: 'A4', kilometers: 24 });
             TestCase.assertTrue(calledAsConstructor);
             TestCase.assertEqual(car2.make, "Audi");
             TestCase.assertEqual(car2.model, "A4");
             TestCase.assertEqual(car2.kilometers, 24);
-            TestCase.assertTrue(car2 instanceof Realm.Object);
+            TestCase.assertInstanceOf(car2, Realm.Object, "car2 not an instance of Realm.Object");
 
             let car2_1 = realm.create('Car2', { make: 'VW', model: 'Touareg', kilometers: 13 });
             TestCase.assertTrue(calledAsConstructor);
             TestCase.assertEqual(car2_1.make, "VW");
             TestCase.assertEqual(car2_1.model, "Touareg");
             TestCase.assertEqual(car2_1.kilometers, 13);
-            TestCase.assertTrue(car2_1 instanceof Realm.Object);
+            TestCase.assertInstanceOf(car2_1, Realm.Object, "car2_1 not an instance of Realm.Object");
 
             let car3 = realm.create('Car3', { make: 'Audi', model: 'A4', kilometers: 24 });
             TestCase.assertTrue(car3ConstructorCalled);
             TestCase.assertEqual(car3.make, "Audi");
             TestCase.assertEqual(car3.model, "A4");
             TestCase.assertEqual(car3.kilometers, 24);
-            TestCase.assertFalse(car3 instanceof Realm.Object);
             //methods from Realm.Objects should be present
             TestCase.assertDefined(car3.addListener);