It was played from 1 to 15 December with the top two teams from each group (two in total) advancing to the knockout stage to compete in a single-elimination tournament.
The away goals rule, extra time and penalty shoot-out were used to decide the winner if necessary.
Vietnam won 3–2 on aggregate against Malaysia in the final to win their second title.
The top two placed teams from each of the two groups advanced to the knockout stage.
Man of the Match: Syamer Kutty Abba (Malaysia) Assistant referees:[7] Abu Bakar Al-Amri (Oman) Abdul Hannan Hasim (Singapore) Fourth official:[7] Oki Dwi Putra (Indonesia) Man of the Match: Phan Văn Đức (Vietnam) Assistant referees:[11] Saoud Al-Maqaleh (Qatar) Bambang Syamsudar (Indonesia) Fourth official:[11] Nazmi Nasaruddin (Malaysia) Man of the Match: Norshahrul Idlan Talaha (Malaysia) Assistant referees:[15] Ahmed Al-Roalle (Jordan) Malang Nurhadi (Indonesia) Fourth official:[15] Thoriq Munir Alkatiri (Indonesia) Man of the Match: Nguyễn Quang Hải (Vietnam) Assistant referees:[19] Akane Yagi (Japan) Manoj Kalwani (Singapore) Fourth official:[19] Ahmad A'qashah (Singapore) Man of the Match: Safawi Rasid (Malaysia) Assistant referees:[23] Ronnie Koh Min Kiat (Singapore) Bambang Syamsudar (Indonesia) Fourth official:[23] Muhammad Taqi (Singapore) Man of the Match: Nguyễn Quang Hải (Vietnam) Assistant referees:[27] Reza Ebrahim Sokhandan (Iran) Reza Mansouri (Iran) Fourth official:[27] Jansen Foo (Singapore)