Gloucester 3 was an English rugby union league which sat at the eleventh level of league rugby union in England for teams based in Gloucestershire as well as some in Bristol. Promoted clubs moved into Gloucester 2. However, there was no relegation as this was the basement league for club rugby union in Gloucestershire. The division was discontinued at the end of the 2017-18 season and Gloucester 2 was divided into north and south regional divisions.
The 2015–16 Gloucester 3 consists of seven teams from Gloucestershire. The season starts on 12 September 2015 and is due to end on 16 April 2016. Four of the seven teams participated in last season's competition. The 2014–15 champions Smiths and runners up Minchinhampton were promoted to the Gloucester 2 while Wotton joined from the Gloucestershire Reserve League. As it is the basement league in Gloucestershire there is no relegation.
Between 2001 and 2005 there was a promotion play-off between the runners-up of Gloucester 3 North and Gloucester 3 South for the third and final promotion place to Gloucester 2. The team with the superior league record had home advantage in the tie. During the 2005-06 season the play-offs were discontinued as Gloucester 3 would merge into one division for the 2006-07 season. Before they were discontinued Gloucester 3 North teams have been the most successful with three wins to the Gloucester 3 South teams' two; and the home team has won promotion on all five occasions.
^This would be the last season for Gloucester 3 North. For 2006-07 the division would merge with Gloucester 3 South to form a new division - Gloucester 3.
^This would be the last season for Gloucester 3 South. For 2006-07 the division would merge with Gloucester 3 North to form a new division - Gloucester 3.
^5 other teams promoted into either Gloucester 2 North or South for the following season as this was the last for Gloucester 3.
^The result of the 2003-04 promotion playoff between Cotham Park and Cainscross is not listed on the RFU website, although Cotham Park would have had home advantage as they had a better league record than Cainscross. We do, however, know that Cotham Park won this game as they were in Gloucester 2 the next season while Cainscross were not.
^There would be no promotion playoff at the end of the 2005-06 season as Gloucester 3 would become a single division the following season. Instead, both champions and runners up from Gloucester 3 North and Gloucester 3 South would be automatically promoted into Gloucester 2.
^Two of St Brendan's Old Boys titles include one in Gloucester 3 North and one in Gloucester 3 South.
^Gloucester Civil Service's titles were won in Gloucester 3 North.
^Ross-on-Wye's titles were won in Gloucester 3 North.
^Bristol Aeroplane's title was won in Gloucester 3 South.
^Cheltenham Civil Service's title was won in Gloucester 3 North.
^Hartpury College's title was won in Gloucester 3 North.