3. deild karla (e. Men's Third division) is a football league in Iceland.

[2] Ever since 1982, the first season of 3. deild karla (then named 4. deild karla), and throughout the 2012 season, it was the lowest division in the league system, and as a consequence did not have a fixed number of teams.

There were various formats used during the 31 seasons when Division 3 was the lowest league, the latest version using group stages and then eight-team playoffs to decide two promoted teams.

2 - ÍH promoted due to expansion of 1. deild karla to 12 teams.

4 - Upon promotion Hamrarnir/Vinir merged with the relegated ÍH to form ÍH/HV 5 - Árborg promoted as Tindastóll merged with 2. deild karla side Hvöt, creating a new team called Tindastóll/Hvöt, playing in the 2. deild karla.