The 2019–20 season of Flamengo Basketball is the 100th season of the club, and the club's 12th in the Novo Basquete Brasil (NBB). This is the inaugural season of the Basketball Champions League Americas, FIBA Americas League successor. The NBB season was cut short due to the COVID-19 pandemic, ending shortly before the end of the regular season, with no playoffs and consequently, no champions declared.