The Fédération Internationale de Motocyclisme confirmed the sad news on Tuesday ... saying Steeman passed away after suffering severe injuries from a multi-rider incident at Turn 14 of the FIM Supersport 300 World Championship’s Race 1 in Portugal.

"Medical personnel and vehicles arrived at the site immediately and the rider was attended to trackside and at the circuit medical centre before being transferred by helicopter to Faro Hospital," FIM said.

"Despite the best efforts of the circuit’s medical staff, marshals and hospital staff, Steeman has sadly succumbed to his injuries."

Steeman -- who rode for the MTM Kawasaki team -- began his career in World Supersport 300 full-time in 2019 ... and racked up four wins, five podiums, and three pole positions this season.

In fact, the Dutch rider made history with the most pole positions in the World Supersport 300 class at the Circuit de Barcelona-Catalunya.

Steeman's family said they feared for Victor's life when he joined the sport ... saying, "Something you have always been afraid of as a parent of a motorcycle racer has now happened."

"Our Victor could not win this last race."

His family says Steeman is a true hero through his passing ... as he was able to save five lives by donating his organs.

"We would like to thank everyone for the way you have lived with us over the past few days. We will miss our Victor enormously.”