At the start of a PUG you have 5 minutes to initially connect to the game before we will begin searching for a new player.
If you disconnect in the middle of the game you have 3 minutes before you will no longer be able to connect and your server slot will expire. At that point, we will begin searching for a new player to replace you in the game.
We are aware that some players may find this quite a short period if they have a slower computer or experience a technical issue mid-match. Keep in mind though that you are affecting 9 other players in-game who want to play a fair 5v5 match so we want to either get you back in or find a suitable replacement as soon as possible.