The Sinn Féin leader has said the Katherine Zappone saga has been a carousel of contradictions and cronyism.
The controversy around her attempted appointment as a UN Special Envoy has hung over the political party think-ins this week.
Foreign Affairs Minister Simon Coveney will face a motion of no confidence tomorrow as the Dáil returns from its summer recess.
Sinn Féin leader Mary Lou McDonald believes he should be voted out of office.
"This fiasco is compounded by the fact that Leo Varadkar, Michael McGrath and Paschal Donohoe can't get their story straight about who knew what, and when.
"It is a carousel of contradictions - around and around it goes, trying to play the people for fools.
"It's old style cronyism, plain and simple."
