"I'm going to remain positive: these three years here have been absolutely fantastic - it's been an ideal preparation for me", he said.
Knowing he had a twenty-place grid penalty coming into the session, Carlos Sainz Jr. used the qualifying session for the Japanese Grand Prix as an extended test session, which ended with the slowest time in the second segment.
It has also paved the way for Pierre Gasly to remain with Toro Rosso, meaning the Frenchman - who finished 14th on his F1 race debut in Malaysia - has subsequently relinquished his chance to win the Super Formula title, with the final round at Suzuka clashing with the United States Grand Prix later this month.
"Since Renault's return to Formula 1, Jolyon has been highly dedicated in an evolving environment".
Sainz was due to join from Toro Rosso at the end of the season but Renault said in a statement that the team and Palmer had now agreed to end their relationship by mutual agreement after Sunday's Japanese Grand Prix.
"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", Sainz said.
"I respect the decision and wish Carlos and the team all the best for the future".
"I've been with them for three years and it's a shame not to be going to Austin with them".
"We will go our separate ways and I will work on something else for my future".
While his vehicle has been riddled with reliability issues, he has also made several costly driver errors and he has recorded just one points finish, at the Singapore GP.
"On my side, I will definitely do my very best in tomorrow's race - this would be the best possible send-off!"
The Brit was going to be replaced by Carlos Sainz, but why hang around for the inevitable?
Gasly and Kvyat are now likely to form Toro Rosso's 2018 driver line-up, although Pascal Wehrlein is considered an outside contender.