The SEA Summer Suiji Showdown 3 (SSSS 3) was a South East Asian team-based (3v3) osu! tournament hosted by phox and Kahli. The tournament featured a Suiji-style team matchmaking system, in which players were assigned to a team at random prior to the start of the tournament based on each other's BWS rank. It was open to all players from all ten ASEAN member states ( Brunei Darussalam, Cambodia, Indonesia, Laos, Malaysia, Myanmar, The Philippines, Singapore, Thailand, and Vietnam) regardless of rank, and was the third iteration of the SEA Summer Suiji Showdown.