Has a FIBA World Cup game ever ended 99-83?
Yes. FIBA World Cup has seen a final score of 99-83 2 times. It first happened on July 13, 1986, when Brazil beat Cuba, and most recently on September 14, 2018, when Egypt beat Chad.
That makes 99-83 the 222nd most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 100-83 has happened 3 times and 99-84 has happened never. At one point the score disappeared for 33 years, between 1986 and 2019.