DONALD Trump's sister Maryanne Trump Barry has died at 86 in New York City. Maryanne Trump Barry was found unresponsive in her Fifth Avenue apartment around 4 am on Monday. 3 Donald Trump's sister Maryanne Trump Barry died on Monday Credit: Getty3 Barry was 86 years old Credit: GettyBarry was found in her bedroom and was pronounced dead on the scene. Barry didn't make many comments about Donald Trump, but she was usually supportive of his business endeavors. His younger brother, Robert S. Trump died while he was president in 2020, and his first wife Ivana Trump died in 2022.