The ex-wife of a prominent Upper East Side oncologist who committed suicide blasted his thieving nurse Thursday for hastening his untimely end.

“You must know that your theft contributed to his demise,” said a weeping Catherine Gaynor at the Manhattan Supreme Court sentencing of Jacqueline Camaro.

Camaro admitted stealing more than $1.4 million from Dr. Mitchell Gaynor and two other physicians.

“You deliberately preyed upon his sickest and his most vulnerable patients who were struggling to survive,” Catherine said before Justice Abraham Clott sentenced Camaro to up to nine years in prison.

Mitchell took his own life in 2015 at the age of 59, according to a New York Times obituary.

Camaro, who admitted to diverting more than 900 patient checks into her own bank account, told the judge Thursday, “I stand before you as a changed person.”