: If you are using a community-patched client (such as those that restore dedicated server support), you can typically open the console by pressing the Tilde (~) key or Shift + Tilde (~) for an expanded view. Common Console Commands
For the original MW3, the standard in-game options do not include a console toggle. You must use external tools or configuration file edits to restore it in a "patched" environment. : : If you are using a community-patched client
In the 2023 version of MW3, there is no traditional developer console for players. Activision strictly enforces a security policy that bans the use of unauthorized commands or debug tools. : If you are using a community-patched client