Twelve participating teams for the 2022/23 U19 ABA League Championship – Borac Mozzart, Mega MIS, Mornar-Barsko zlato, Crvena zvezda mts, MZT Skopje Aerodrom, SC Derby, Igokea m:tel, Krka, Split, Cedevita Olimpija, Vojvodina and Zadar - will be divided into four first stage groups.
In the first stage, all teams will face each other team within a group in a round-robin system. The best-placed team of each group will advance to the final tournament.
At the final tournament, the teams will play two games – the semifinal and the final or third place game. The winner of the final tournament will become the champion of the 2022/23 U19 ABA League Championship.