The league brought together amateur clubs and reserve sides of professional clubs, split into 6 geographic groups of 16 teams, making a total of 96 teams. The reserve teams were not allowed to be promoted to the Division 2, therefore only amateur clubs could have a chance at promotion. This meant that the best amateur club in each respective group was promoted to the D2 at the end of the season, for a total of 6 promoted teams. Concerning relegation, both amateur clubs and reserve sides were eligible; the bottom three teams of each group were relegated to the fourth tier. From 1971 to 1978, this fourth division was the Division d'Honneur of regional leagues, but from 1978 to 1993, a
Division 4 was put into place. From the D4, 8 clubs were promoted. At the end of the season, the winners of each group (both amateur clubs and reserve sides) played against each other in order to crown a champion of the Division 3. This tournament would be concluded with a final. Some finals were played in two-leg confrontations. In 1981,
ASPV Strasbourg refused promotion to the Division 2, and therefore won two consecutive D3 titles (in 1980–81 and 1981–82). == Performances by team ==