After the 2019 FIBA Basketball World Cup in November 2019, the qualification process for the 2021 FIBA Asia Cup begins. With the 16 FIBA Asia Cup 2017 teams and best 8 teams that played the Pre-Qualifiers during the previous qualification windows.
This makes a total of 24 teams playing qualification games for the 2021 FIBA Asia Cup. The 24 teams are divided into 6 groups of 4 teams and each team plays the other 3 teams on a home and away basis over 3 windows with 2 games per window. The windows are; November 2019, February 2020, and November 2020. The top 2 teams from each of the 6 groups qualify for the 2021 FIBA Asia Cup, making a total of 12 teams.
The six 3rd place teams from each group qualify to play in a final qualifying tournament in February 2021. And the top 4 teams from this tournament, will qualify for the 2021 FIBA Asia Cup.