Spanish basketball clubs in European and worldwide competitions is a compilation of the results of clubs from Spain's national top-tier level men's professional basketball league, the Liga ACB, in official international competitions.
The 2019–20 season was Kirolbet Baskonia's 61st in existence and the club's 38th consecutive season in the top flight of Spanish basketball and the 20th consecutive season in the EuroLeague.
The 2020 FIBA Men's Olympic Qualifying Tournaments includes teams whose rosters consists of 12 players; a team may opt to have one naturalized player as per FIBA eligibility rules in their roster.