From 611681140700c774d606d0cc1bce288b2b6683f8 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steven.silvester@ieee.org>
Date: Tue, 7 Oct 2025 15:51:44 -0500
Subject: [PATCH] PYTHON-5609 Prepare for 4.15.3 Release (#2584)

---
 doc/changelog.rst   | 18 ++++++++++++++++++
 pymongo/_version.py |  2 +-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/doc/changelog.rst b/doc/changelog.rst
index 9ca1d47e9..bde6125c4 100644
--- a/doc/changelog.rst
+++ b/doc/changelog.rst
@@ -1,6 +1,24 @@
 Changelog
 =========
 
+Changes in Version 4.15.3 (2025/10/07)
+--------------------------------------
+
+Version 4.15.3 is a bug fix release.
+
+- Fixed a memory leak when raising :class:`bson.errors.InvalidDocument` with C extensions.
+- Fixed the return type of the  :meth:`~pymongo.asynchronous.collection.AsyncCollection.distinct`,
+  :meth:`~pymongo.synchronous.collection.Collection.distinct`, :meth:`pymongo.asynchronous.cursor.AsyncCursor.distinct`,
+  and :meth:`pymongo.asynchronous.cursor.AsyncCursor.distinct` methods.
+
+Issues Resolved
+...............
+
+See the `PyMongo 4.15.3 release notes in JIRA`_ for the list of resolved issues
+in this release.
+
+.. _PyMongo 4.15.3 release notes in JIRA: https://jira.mongodb.org/secure/ReleaseNote.jspa?projectId=10004&version=47293
+
 Changes in Version 4.15.2 (2025/10/01)
 --------------------------------------
 
diff --git a/pymongo/_version.py b/pymongo/_version.py
index b5c177930..e517f5677 100644
--- a/pymongo/_version.py
+++ b/pymongo/_version.py
@@ -18,7 +18,7 @@ from __future__ import annotations
 import re
 from typing import List, Tuple, Union
 
-__version__ = "4.15.3.dev0"
+__version__ = "4.15.3"
 
 
 def get_version_tuple(version: str) -> Tuple[Union[int, str], ...]: