In cases where a club from an individual country does not apply for the 2020–21 season, the empty spot will be filled by awarding wild cards.

The first two teams from the previous season, Borac Čačak and Split, were awarded wild cards to compete in the 2020–21 ABA League First Division.

[2] The labels in the parentheses show how each team qualified for the place of its starting round: In early June 2020, seven clubs contested for four wild cards.

[3][4] Later that month, Serbian club Novi Pazar withdrew its bid following failure to meet financial requirements.

[2] Teams Borac Banja Luka (Bosnia and Herzegovina) and Gostivar (North Macedonia) did not receive the wild card.

Reportedly, Borac Banja Luka received an invitation on 6 October 2020, after Sloboda Tuzla withdrawal.

[6][7] On 13 October, the League officially confirmed Borac Banja Luka as the final participant in the 2020–21 season.