“I am taking a leave of absence due to the state of my husband's health and ask that our privacy be respected at this time,” Dalziel said.
“I will be making no further comment.”
Deputy Mayor Andrew Turner will be the acting mayor during this period.
In 2018, Dalziel revealed her husband's cancer diagnosis.
Dalziel said her husband, Rob Davidson, was diagnosed with cancer a few weeks after the June Cancer Society Ball in 2018.
Davidson is a well-known lawyer and father of city councillor Mike Davidson.
Shortly after his diagnosis, Dalziel said in a column for The Star: "Rob came back from overseas feeling unwell.
"He went to the doctor and began a barrage of tests. Finally a bone scan and a biopsy confirmed it was prostate cancer. It came as a big shock."
