Has a FIBA World Cup game ever ended 61-58?
Exactly once. On June 30, 2018, Morocco beat DR Congo 61-58, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 61-58 in league history.
That makes 61-58 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 62-58 has happened 2 times and 61-59 has happened 1 times.