Dorset & Wilts 3 West was English Rugby Union league, forming part of the South West Division, for clubs based in western Dorset. Promoted teams tended to move up to Dorset & Wilts 2 North or Dorset & Wilts 2 South depending on geographical location and there was no relegation. The league was originally created as Berks/Dorset/Wilts 3 West in 1988 and ran until 1992 until it merged with Berks/Dorset/Wilts 3 East to form Berks/Dorset/Wilts 3. The division would return as Dorset & Wilts 3 West in 2006. By the end of the 2008–09 season, the league was disbanded and clubs were transferred to Dorset & Wilts 3 North or Dorset & Wilts 3 South.
Original teams
When this division was introduced in 1988 as Berks/Dorset/Wilts 3 West, it contained the following teams from Dorset and Wiltshire[a]:
Originally known as Berks/Dorset/Wilts 3 West and involved involving clubs based in Berkshire[e], Dorset and Wiltshire. It was a tier 10 league with promotion to Berks/Dorset/Wilts 2 and there was no relegation. At the end of the 1991–92 season Berks/Dorset/Wilts 3 West and counterpart Berks/Dorset/Wilts 3 East would merge into a single division known as Berks/Dorset/Wilts 3 (currently Dorset & Wilts 3 North and Dorset & Wilts 3 South).