The internet was aware that Palmer's days were numbered with Renault even before the driver himself knew, and now it's official: Joylon Palmer's last race with Renault (and likely his last F1 race, period) will be in Sunday's Japanese Grand Prix.

Many have been calling for Palmer to exit the team early, with Carlos Sainz Jr. set to join the team in 2018.

As a result of the switch, Toro Rosso have confirmed that Daniil Kvyat will be brought back in alongside Pierre Gasly for the USA race.

In a post on his Instagram account on Saturday after qualifying for the Japanese Grand Prix, Palmer announced he would be leaving the team after the Suzuka weekend.

The Brit started P18 due to engine penalties and finished P12 in what was confirmed to be his final race for Renault, making way for Carlos Sainz to make his switch from Toro Rosso early than planned.

When Grand Prix of Japan concludes, Sainz will have to change chip and think about retracing those positions that can make Renault a good handful of millions, between five and 10 approximately.

"When I'm heading back on the plane maybe it will sink in that I'm not driving for Renault again and maybe not in Formula 1 again".

Sainz, who will be loaned to Renault from Red Bull in 2018, 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".

"We look forward to beating him on track". "I've been with the team now for three years so it's a shame not to be going to Austin with them".

"Therefore, on behalf of everyone at Toro Rosso, I wish him all the very best with his new team".

"On my side, I will definitely do my very best in tomorrow's race - this would be the best possible send-off!"

"They did an wonderful job and congratulations for that, it shows the commitment they have, and I really appreciate it". Palmer does not have a ride lined up in Formula One for the next season yet, though he is rumored to be considering a move to IndyCar in the next year.

Neir Renault nor Carlos Sainz wanted to wait any longer.

Palmer, a former GP2 champion, was a reserve driver with Lotus before landing a full-time race seat with the rebranded Renault in 2016.

It's been a disappointing couple of seasons for Palmer, who's failed to equal the performances of his team-mate, German Nico Hulkenberg. This would also seem to confirm Gasly for the remainder of the 2017 season with Toro Rosso.