diff --git a/packages/edit-site/src/components/editor/index.js b/packages/edit-site/src/components/editor/index.js
index bb81ddfde978df..a6ba9646d72b5f 100644
--- a/packages/edit-site/src/components/editor/index.js
+++ b/packages/edit-site/src/components/editor/index.js
@@ -3,7 +3,12 @@
  */
 import { useEffect, useState, useMemo, useCallback } from '@wordpress/element';
 import { AsyncModeProvider, useSelect, useDispatch } from '@wordpress/data';
-import { SlotFillProvider, Popover, Button } from '@wordpress/components';
+import {
+	SlotFillProvider,
+	Popover,
+	Button,
+	Notice,
+} from '@wordpress/components';
 import { EntityProvider, store as coreStore } from '@wordpress/core-data';
 import { BlockContextProvider, BlockBreadcrumb } from '@wordpress/block-editor';
 import {
@@ -217,6 +222,20 @@ function Editor( { initialSettings } ) {
 														}
 													/>
 												) }
+												{ ! template &&
+													settings?.siteUrl &&
+													entityId && (
+														<Notice
+															status="warning"
+															isDismissible={
+																false
+															}
+														>
+															{ __(
+																"You attempted to edit an item that doesn't exist. Perhaps it was deleted?"
+															) }
+														</Notice>
+													) }
 												<KeyboardShortcuts />
 											</>
 										}
diff --git a/packages/edit-site/src/components/header/document-actions/index.js b/packages/edit-site/src/components/header/document-actions/index.js
index 99fe151aae290f..fc9f592215df43 100644
--- a/packages/edit-site/src/components/header/document-actions/index.js
+++ b/packages/edit-site/src/components/header/document-actions/index.js
@@ -56,6 +56,7 @@ function useSecondaryText() {
  * @param {string}   props.entityLabel A label to use for entity-related options.
  *                                     E.g. "template" would be used for "edit
  *                                     template" and "show template details".
+ * @param {boolean}  props.isLoaded    Whether the data is available.
  * @param {Function} props.children    React component to use for the
  *                                     information dropdown area. Should be a
  *                                     function which accepts dropdown props.
@@ -63,6 +64,7 @@ function useSecondaryText() {
 export default function DocumentActions( {
 	entityTitle,
 	entityLabel,
+	isLoaded,
 	children: dropdownContent,
 } ) {
 	const { label } = useSecondaryText();
@@ -73,7 +75,7 @@ export default function DocumentActions( {
 	const titleRef = useRef();
 
 	// Return a simple loading indicator until we have information to show.
-	if ( ! entityTitle ) {
+	if ( ! isLoaded ) {
 		return (
 			<div className="edit-site-document-actions">
 				{ __( 'Loading…' ) }
@@ -81,6 +83,15 @@ export default function DocumentActions( {
 		);
 	}
 
+	// Return feedback that the template does not seem to exist.
+	if ( ! entityTitle ) {
+		return (
+			<div className="edit-site-document-actions">
+				{ __( 'Template not found' ) }
+			</div>
+		);
+	}
+
 	return (
 		<div
 			className={ classnames( 'edit-site-document-actions', {
diff --git a/packages/edit-site/src/components/header/index.js b/packages/edit-site/src/components/header/index.js
index cec802d095db8e..1ecc11aa842156 100644
--- a/packages/edit-site/src/components/header/index.js
+++ b/packages/edit-site/src/components/header/index.js
@@ -42,6 +42,7 @@ export default function Header( {
 		isInserterOpen,
 		isListViewOpen,
 		listViewShortcut,
+		isLoaded,
 	} = useSelect( ( select ) => {
 		const {
 			__experimentalGetPreviewDeviceType,
@@ -64,10 +65,12 @@ export default function Header( {
 			'wp_template' === postType
 				? getTemplateInfo( record ).title
 				: record?.slug;
+		const _isLoaded = !! postId;
 
 		return {
 			deviceType: __experimentalGetPreviewDeviceType(),
 			entityTitle: _entityTitle,
+			isLoaded: _isLoaded,
 			hasFixedToolbar: isFeatureActive( 'fixedToolbar' ),
 			template: record,
 			templateType: postType,
@@ -146,6 +149,7 @@ export default function Header( {
 					<DocumentActions
 						entityTitle={ entityTitle }
 						entityLabel="template"
+						isLoaded={ isLoaded }
 					>
 						{ ( { onClose } ) => (
 							<TemplateDetails
@@ -159,6 +163,7 @@ export default function Header( {
 					<DocumentActions
 						entityTitle={ entityTitle }
 						entityLabel="template part"
+						isLoaded={ isLoaded }
 					/>
 				) }
 			</div>