ヘルムート・マルコ
In August 2016, Kari was also announced to take part in the GP3 rounds at Spa-Francorchamps with Koiranen GP, in place of Ralph Boschung. In November 2016, Helmut Marko confirmed Kari would move to the series full-time in 2017. In January, Kari was signed to Arden International. Kari finished the season with 63 points and a 10th place in drivers' championship. He was dropped from the Red Bull Junior Team after the season.