The Mobile Legends: Bang Bang tournament for the 2021 Southeast Asian Games was held on May 18 to 20 at the Vietnam National Convention Center in Hanoi, Vietnam.

This was the second iteration of the MLBB Tournament in the Southeast Asian Games, the first one being held in 2019.

[1] The tournament consisted of a group stage and a single-elimination playoff round.

They retained their title after beating Indonesia 3-1 in the final.

[2] Reference: [1] ^ Vietnam and Singapore had the same final result during the Group Stage.