Indonesia won the tournament after beating Thailand 2–1 in the final. The tournament was held from 17 to 26 February in Phnom Penh, Cambodia. This was its first as an under-22 tournament, with the previous edition an under-23 tournament.
2005 AFF U-23 Youth Championship winners Thailand were the defending champions, as there was no competition from 2006 to 2018, as the 2011 edition has been cancelled. The 2003 ASEAN Club Championship invited the Indian club, East Bengal, till they become a champions, but this tournament not invited Australian National U-22 Team to participated here as the outside-Southeast Asia participant.
There was no qualification, and all entrants advanced to the final tournament. The following teams from member associations of the AFF entered the tournament (excluding Australia). Singapore withdrew from the tournament in order to focus on the 2020 AFC U-23 Championship qualification tournament in March. Brunei and Laos also withdrew from the tournament.
According to wikipedia