The commands below will help you pause and unpause the match when you playing with bots or during freeze time.
Everyone can write in the chat You can buy items Players can join without unpausing
Completely Pause the MatchThe command completely pauses the match, so nobody can write, connect to the server, buy items or move. To unpause the match enter unpause in the console
sv_cheats 1; sv_pausable 1; pause
Pause the Match During Freeze TimeThe command pauses the match only during freeze time. To unpause the match enter mp_unpause_match in the console