Former minister for Women in the Presidency Bathabile Dlamini said she did not hold any grudge for being reshuffled and not being appointed in President Cyril Ramaphosa's new Cabinet.
Dlamini said so in her letter as she resigned from her position as member of parliament for the ANC.
Dlamini, who is one of 14 former ministers who did not make it back to Cabinet, did not give reasons for quitting as MP.
However in her letter to the ANC she says: "We must all be worried about the expediency that has been done within the aim of discrediting some of us. I hold no grudge for being reshuffled and not being appointed".
Dlamini, who is the head of the ANC Women's League, thanked the party for the opportunity to "serve the nation".