diff --git a/csharp/ql/src/Language Abuse/ForeachCapture.ql b/csharp/ql/src/Language Abuse/ForeachCapture.ql
index 0148796a2e72..2f8346817a6f 100644
--- a/csharp/ql/src/Language Abuse/ForeachCapture.ql	
+++ b/csharp/ql/src/Language Abuse/ForeachCapture.ql	
@@ -1,4 +1,6 @@
 /**
+ * @deprecated This query is no longer relevant as the semantics of capturing a 'foreach' variable
+ *             and using it outside the loop has been stable since C# version 5.
  * @name Capturing a foreach variable
  * @description Code that captures a 'foreach' variable and uses it outside the loop behaves differently in C# version 4 and C# version 5
  * @kind problem
diff --git a/csharp/ql/src/change-notes/2025-09-10-deprecate-foreach-capture.md b/csharp/ql/src/change-notes/2025-09-10-deprecate-foreach-capture.md
new file mode 100644
index 000000000000..5628e9496286
--- /dev/null
+++ b/csharp/ql/src/change-notes/2025-09-10-deprecate-foreach-capture.md
@@ -0,0 +1,4 @@
+---
+category: deprecated
+---
+* The query `cs/captured-foreach-variable` has been deprecated as the semantics of capturing a 'foreach' variable and using it outside the loop has been stable since C# version 5.