The South Australian premier is still standing by his deputy Vickie Chapman after state parliament passed a vote of no confidence in the minister.
Steven Marshall also ruled out involving the SA governor in the saga, which erupted after a parliamentary inquiry found the planning minister had repeatedly misled parliament over a rejected Kangaroo Island development application.
"She has my 100 per cent support," Mr Marshall said on Friday.
"The governor takes advice from the executive council and me as the premier and I won't be issuing any advice to remove Vickie Chapman."
On Thursday, MPs voted in favour of a no-confidence motion against Ms Chapman by 23 votes to 22 against.
It was the first time in SA political history a no-confidence motion against a sitting minister has passed in the lower house.
Labor MP Stephen Mullighan moved the motion, declaring Ms Chapman "must resign" after a parliamentary committee inquiry found she repeatedly misled parliament about conflicts of interest.
The committee on Thursday tabled its report on the $40 million Kangaroo Island development, which was rejected by Ms Chapman, who is also Attorney-General, in August.
Ms Chapman's family owns a rental property on the island near the rejected development and was accused of having a conflict of interest when she made that decision.
She had told the committee she had no personal interest in any business or industry on the island.
The committee recommended she be suspended from parliament for nine days and make a public apology for misleading statements about the application to construct a timber port.
Thursday's events put the SA Speaker Dan Cregan in a difficult position because the no-confidence motion called on him to present a copy to Governor Frances Adamson expressing the lower house's will that Ms Chapman no longer serve as deputy premier and as a minister.
Mr Marshall said while Ms Adamson was consulted on "many strategic issues, Vickie Chapman is not one of them".
Australian Associated Press