London 3 South West is an English rugby union league at the eighth level of club rugby union in England involving sides based in Hampshire, Surrey and south-west London. Promoted clubs move into London 2 South West. Relegated clubs move into either Surrey 1 or Hampshire Premier depending on their location, with sides coming up from these divisions, although only 1st XV clubs are allowed in London 3 South West. Each year all clubs in the division also take part in the RFU Senior Vase - a level 8 national competition.