An NOC may enter up to one men's team with 12 players and up to one women's team with 12 players. Automatic qualifications were granted to the host country for both events plus the gold and silver medal winners from the previous Olympic Games in the men's tournament, and the champion at the 1983 FIBA World Championship in the women's tournament. Additional spots for the men's tournament were decided via the continental championships held by FIBA, while the remaining slots for the women's competition were assigned to the top six teams in a tournament held in Havana, Cuba months before the Olympic Games.
Withdrew from the tournament.
Replaced the Soviet Union.
Replaced the Soviet Union and Hungary.
Two groups of six teams are formed, where the top four from each group advance to the knockout stage.
Fifth and sixth places from each group form an additional bracket to decide 9th–12th places in the final ranking.