Deirdre Hargey last night announced her intention to stand aside as Minister of Communities, temporarily, due to "health reasons".
The Sinn Fein assembly member said she had informed both Michelle O'Neill, vice president of her party and Mary Lou McDonald, party president, of her move to step aside.
"Due to illness I have been admitted to hospital, and am to undergo surgery in the coming days, which will require time to properly recover," she said.
"In light of these exceptional personal circumstances I am unable in the short term to discharge my ministerial duties, or participate fully in the Executive Committee.
"I have also written to Joint Heads of Government Michelle O'Neill and Arlene Foster to inform them of my decision to stand aside from my ministerial post.
"I look forward to being able to resume ministerial responsibilities in a number of weeks following my treatment and recovery".
Michelle O'Neill wished Deirdre Hargey a fully and speedy recovery and thanked her for the "excellent work she has done in her ministerial role to date.
"I look forward to her returning to that post on her recovery and hope she will be back behind her desk as soon as possible," she said.
"I am appointing Carál Ní Chuilín as Minister for Communities on a temporary basis until Deirdre Hargey's return.
"I wish Carál well and know that she will bring a wealth of experience, determination and dedication to the post".
