Daniil Kvyat will return to Toro Rosso for the United States Grand Prix following confirmation that Carlos Sainz Jr. will replace Jolyon Palmer at Renault for the final four races of the 2017 season.
Pierre Gasly will therefore retain his seat for the race, which will mean the Frenchman misses the Super Formula title decider in which he sits second, just half a point shy of leader Hiroaki Ishiura.
Kvyat had been replaced by Gasly for "some" of the remaining races, but will now return to fill the vacant seat, although Toro Rosso haven't confirmed their line-up after the US GP.
"I would like to thank Carlos for all his efforts over almost three Formula 1 seasons," said team boss Franz Tost. "He always did his very best, demonstrating an excellent attitude and commitment to his work, which helped him and us to get some great results during that time.
"Therefore, on behalf of everyone at Toro Rosso, I wish him all the very best with his new team. We look forward to beating him on track!"
Sainz added: "First of all I would like to thank Toro Rosso and Red Bull for allowing me the possibility of finishing this season with Renault Sport Racing.
"More specifically, I really want to thank all my engineers and mechanics for their support and tremendous work throughout these years. Toro Rosso is made up of a fantastic group of people and I wish them only the best for the future.
"On my side, I will definitely do my very best in tomorrow's race… this would be the best possible send-off! Additionally, competing in these last four races with Renault gives me a good opportunity to get to know the team and the car earlier than expected. I am looking forward to start working with them."
