Mazepin was photographed clicking on his Instagram account at a recent Halloween-themed event.
The Russian driver drove for Haas during the 2021 F1 season alongside Mick Schumacher.
Haas decided to fire Mazepin before the 2022 season following the Russian invasion of Ukraine.
The American team was also forced to fire Russian title sponsor Uralkali, a company owned by Mazepin’s father, Dmitry Mazepin.
With the International Olympic Committee banning Russian and Belarusian athletes from participating in international competition, Mazepin’s future in motorsports has been curtailed.
Although the FIA has decided to allow Russian drivers to compete as long as they participate in a neutral way, Mazepin has refused to do so.
Earlier this year, he told rsport.ria.ru: “People cannot be sentenced. We are athletes and each one has their own choices, which must be respected.
“Zhiltsov is not the only one, [Russian turned Israeli driver] Robert Shwartzman did the same. There is a matter of personal considerations. Whether you want to give up your country for sport and it’s more important to you or not, everyone chooses for himself, but I won’t.”
Mazepin called the sanctions “cancel culture against my country.”
“I don’t agree with being in the sanctions,” Mazepin added. “I have already said before that I agree to fight against it. Maybe now is not the right time. If you look at the whole situation that is happening against the athletes in the general case, it is to cancel the culture against my country.