Charles and the architecture student took their romance public back in 2019 ... and Sine was a regular in the paddock at his F1 races over the years.
Charlotte also released a statement about the split ... saying, "Charles and I have decided to end our relationship and stay good friends. It's been 3 beautiful years together with loads of memories."
"He is an amazing person and I wish him the best."
It's not the only breakup Leclerc has dealt with recently -- Ferrari team principal Mattia Binotto resigned from his position following the 2022 season, in which Charles finished second in the driver standings.