diff --git a/Lib/argparse.py b/Lib/argparse.py
index fe48f8670fa20a4..808e1401dba4949 100644
--- a/Lib/argparse.py
+++ b/Lib/argparse.py
@@ -405,6 +405,8 @@ def _format_actions_usage(self, actions, groups):
             else:
                 end = start + len(group._group_actions)
                 if actions[start:end] == group._group_actions:
+                    if all((action.help is SUPPRESS for action in group._group_actions)):
+                        continue
                     for action in group._group_actions:
                         group_actions.add(action)
                     if not group.required:
diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py
index 2b7f008d38564bc..f2a625a972b4e10 100644
--- a/Lib/test/test_argparse.py
+++ b/Lib/test/test_argparse.py
@@ -2695,6 +2695,25 @@ def test_help(self):
               '''
         self.assertEqual(parser.format_help(), textwrap.dedent(expected))
 
+    def test_help_subparser_all_mutually_exclusive_group_members_suppressed(self):
+        self.maxDiff = None
+        parser = ErrorRaisingArgumentParser(prog='PROG')
+        commands = parser.add_subparsers(title="commands", dest="command")
+        cmd_foo = commands.add_parser("foo")
+        group = cmd_foo.add_mutually_exclusive_group()
+        group.add_argument('--verbose', action='store_true', help=argparse.SUPPRESS)
+        group.add_argument('--quiet', action='store_true', help=argparse.SUPPRESS)
+        cmd_foo.add_argument("--longlonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglong")
+        expected = '''\
+            usage: PROG foo [-h]
+                            [--longlonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglong LONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONG]
+
+            options:
+              -h, --help            show this help message and exit
+              --longlonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglonglong LONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONGLONG
+              '''
+        self.assertEqual(cmd_foo.format_help(), textwrap.dedent(expected))
+
     def test_empty_group(self):
         # See issue 26952
         parser = argparse.ArgumentParser()