The article contains information about the 2021–22 Iran 3rd Division football season.
The teams ranked 6th and lower relegate to Provincial Leagues.
The winner of each group will promote to 2nd division and 3 runners-up and the best 3rd placed team will qualify to Play-off stage.
Damash Gilan won 2-1 on aggregate and promoted to second play-off round.
Damash Gilan won 4-1 on aggregate and promoted to 2022-23 Iran Football's 2nd Division.