Lindsey Vonn will not be walking down the aisle with P.K. Subban after all -- they've called off their engagement ... and their romantic relationship, altogether.
The sports power couple -- who've been together since at least 2018 -- made a joint announcement Tuesday afternoon ... both posting the same photo with similar captions.
Lindsey writes, "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."
She goes on to add, "However, after much consideration we have decided to move forward separately.