The ABA League Assembly and the Basketball Federation of Slovenia cancelled their respective competitions for the 2019–20 season due to the COVID-19 pandemic.

Source: Coaches & Staff Archived 2019-08-14 at the Wayback Machine Win Loss Void Note: Cancelled due to the COVID-19 pandemic in Croatia.

Note: Originally to be scheduled to 5 December 2020, due to the Zadar roster quarantine it was postponed and rescheduled to 10 January 2021.

[32] Note: Originally to be scheduled to 20 December, due to the Crvena zvezda roster quarantine it was postponed[33] and rescheduled to 14 April 2021.

[34] Note: Originally to be scheduled to 9 January 2021, due to the Krka roster quarantine it was postponed and rescheduled to 10 February.

Note: Originally to be scheduled to 6 February 2021, due to the Cedevita Olimpija roster quarantine it was postponed and rescheduled to 8 April 2021.

[38][39] Note: Originally to be scheduled to 26 March 2021, due to the Cedevita Olimpija roster quarantine it was postponed and rescheduled to 20 April 2021.

The Cedevita Olimpija entire roster had to remain in quarantine due to the requirement of the National Institute of Public Health of Slovenia after one of its players had tested positive for COVID-19.

[47] Ten day late, Euroleague Basketball confirmed the modification of the Special Regulations and removed the 20-0 results for all games.

Promitheas requested the suspension of the game due to local legislation imposing quarantine measures on the team.

[52] On 7 September 2020, the Basketball Federation of Slovenia announced that Krka would play in the Supercup, following the withdrawal of Koper Primorska due to roster problems.