Julie Bishop walked into Friday's Liberal partyroom meeting with Malcolm Turnbull.
Bishop announced she would move to the backbench and had not yet decided whether to contest the next election, which is due by May 2019.
"I will remain on the backbench as a strong voice for Western Australia", Bishop said in a statement soon after she arrived back in her home state.
Speaking to The West Australian, an emotional Ms Bishop ranked her fight to win justice for families who lost loved ones in the on MH17 as among her greatest achievements, and urged her successor to continue to pursue Russian authorities.
"As Australia's leading stateswoman, her strength of leadership and diplomacy make her a role model for not only young women, but all Australians", the Maslins said.
Dutton had assumed the inaugural role of minister for Home Affairs after former Prime Minister Malcolm Turnbull past year created the superministry that combined the functions of the Australian Security Intelligence Organisation (ASIO), Australian Federal Police (AFP), Border Force, Australian Criminal Intelligence Commission (ACIC), Austrac, and the office of transport security.
Turnbull then relinquished his prime ministership on Friday after a second leadership spill that saw former Treasurer Morrison defeat Dutton 45-40 in a party vote and be sworn in as Australia's 30th prime minister on Friday night. As of Saturday night, it had raised $2,820 of its $2,500 goal.
She told him yesterday morning she would resign.
John Howard does not support changing Liberal leadership rules
Greg Hunt has kept the Health portfolio and Christian Porter remains as attorney-general, while Marise Payne takes Foreign Affairs following the resignation earlier Sunday afternoon by Julie Bishop; Kelly O'Dwyer takes Jobs, Industrial Relations and Women; and Dan Tehan takes Education.
"Australia is New Zealand's most important partner", said Ms Ardern.
". she has earned, absolutely, the respect of foreign ministers around the world", he said.
The possibility that Ms Bishop could leave Parliament before the next election will be a major concern for Mr Morrison, Mr Turnbull's former treasurer, because it opens the possibility of another by-election being held for her seat.
He said Ms Bishop came into Parliament the hard way when she successfully challenged John Howard ally turned independent Allan Rocher for the seat of Curtin in 1998.
Asked in 2013 if she could withstand several terms of government as foreign minister, the reportedly indefatigable Bishop was unwavering.
Businessman and friend John Poynton said the past week JUhad been very bruising for Ms Bishop.