Foreign Minister Murray McCully has announced he's not returning to Parliament in 2017.
He had announced he would not contest the East Coast Bays seat, which he has held since 1987, and has now said he won't stand for National's list either.
"I feel greatly privileged to have had a unique partnership with John Key in managing New Zealand's foreign policy interests for over eight years" Mr McCully said.
"We can look back on some significant foreign policy achievements, including New Zealand's election to the United Nations Security Council, where I am currently attending my final meetings in New York prior to the conclusion of our term at the end of December."
He joins a growing list of National MPs and Ministers not seeking re-election, with Craig Foss and Sam Lotu-Iiga announcing earlier this week that they'd be stepping out before the next election.
Prime Minister Bill English is expected to announce his reshuffled Cabinet this Sunday.