NBA champ Iman Shumpert and Amber Rose stripped down to their swimsuits and enjoyed a day in the Miami heat … but before ya get any ideas — TMZ Sports is told it was nothing more than a platonic gathering.

The former Cleveland Cavaliers guard and model/personality were spotted lounging on some beach chairs on Wednesday … smoking what appeared to be some ciggys as they chopped it up near the water.

Rose rocked a black halterneck suit for the occasion … and Shump sported some light-colored trunks.

While many would naturally speculate their being out together could mean they’re a “thing,” our sources say it was simply two buds chilling.

Shump and Rose were on BET’s “College Hill: Celebrity Edition” back in 2022 … and we’re told they remained tight after the show finished.

The coupling would have made sense, though … as Shump is seemingly single after his divorce from wife, Teyana Taylor.

As for Rose, the only man in her life at the moment is former president Donald Trump … who she campaigned for at the Republican National Convention in July.