They made the announcement in separate Instagram posts Tuesday.
“Over the past 3 years PK and I have had some incredible times together. He is a kind, good man, and someone I respect a great deal,” Vonn wrote alongside a photo of her and Subban.
“However, after much consideration we have decided to move forward separately. We will always remain friends and love each other immensely.”
In his post, Subban said Vonn is “one of the most kind and caring people” he knows.
“I will always treasure our time as a couple together and the many laughs we shared,” he wrote.
Vonn, an Olympic skier and gold medallist for the U.S., who is 36, and 31-year-old Subban, a Canadian professional hockey player for the New Jersey Devils, were known for their philanthropy and fashion.
Earlier on HuffPost: