Sussex Sunday Football League Division 3

The Sussex Sunday Football League Division 3 is a football league in West Sussex, England. It is the third tier of the Sussex Sunday Football League, below the Premier Division and Division 2.

The league was founded in 1925 and currently has 16 teams competing in it. The teams are divided into two groups of eight, with each team playing each other team in their group once, home and away. The top two teams from each group at the end of the season qualify for the promotion playoffs, with the winners of the playoffs being promoted to Division 2.

The current champions of Division 3 are Crawley Tamil Sports Club.