Son of former motorcross rider Phillipe Dupasquier, Jason Dupasquier started his career in Supermoto and was a multiple-time Swiss National champion. He then made the successful switch to circuit racing by claiming the ADAC NEC Championship Moto3 crown in 2016, before then moving onto the Junior World Championship for 2017. The Swiss teenager made steady progress throughout 2017 and was ready to make his debut in the Red Bull Rookies Cup in 2018 before breaking his left femur in the second round of the Junior World Championship. He missed the entire 2018 Rookies Cup campaign but came back in 2019 to end the season eighth overall with a best result of fourth in Jerez. Dupasquier made his Moto3™ World Championship debut in 2020 and will once again ride for the PrüstelGP squad in 2021. After securing five points finishes in a row, including a career-best P7, Dupasquier tragically lost his life after a qualifying crash at the Italian GP.