diff --git a/news/7297.removal b/news/7297.removal
new file mode 100644
index 00000000000..663fd9ad609
--- /dev/null
+++ b/news/7297.removal
@@ -0,0 +1 @@
+Deprecate undocumented ``--skip-requirements-regex`` option.
diff --git a/src/pip/_internal/cli/base_command.py b/src/pip/_internal/cli/base_command.py
index dad08c24ea7..6b404954044 100644
--- a/src/pip/_internal/cli/base_command.py
+++ b/src/pip/_internal/cli/base_command.py
@@ -131,6 +131,17 @@ def _main(self, args):
                 ) + message
             deprecated(message, replacement=None, gone_in=None)
 
+        if options.skip_requirements_regex:
+            deprecated(
+                "--skip-requirements-regex is unsupported and will be removed",
+                replacement=(
+                    "manage requirements/constraints files explicitly, "
+                    "possibly generating them from metadata"
+                ),
+                gone_in="20.1",
+                issue=7297,
+            )
+
         # TODO: Try to get these passing down from the command?
         #       without resorting to os.environ to hold these.
         #       This also affects isolated builds and it should.