“Dupasquier was involved in a multidisciplinary incident between turns 9 and 10, with the Red Flagged session afterwards,” the statement said.
“FIM medical intervention vehicles immediately arrived on the scene and the Swiss pilot was treated on the runway before being transported by medical helicopter, in a stable condition, to Careggi Hospital in Florence.
“Despite the efforts of the circuit’s medical staff and all subsequent assistants to the Swiss driver, the hospital has announced that Dupasquier has sadly succumbed to his injuries.”
His team, Prüstel GP, said on Facebook, “We are devastated and right now all our thoughts are related to Jason’s family. You will miss him and you will never forget him, Jason.”
MotoGP added on Twitter: “On behalf of the entire MotoGP family, we send our love to your team, your family and your loved ones. You will miss you so much, Jason. Ride in peace.”
Dupasquier was in his second season at the Moto3 World Championship. He finished 12th with 27 points.
Dupasquier began his career at Supermoto, where he was Swiss national champion on multiple occasions. He won the NEC Championship Moto3 title in 2016 before moving on to the Junior World Championship a year later.