"The only truth here is that a relationship came to an end & what remains is a huge amount of love and respect," the 32-year-old Scottish DJ shared, confirming the split.
Swift, who dated Harris for 15 months, has yet to comment on the breakup, but she did retweet her ex's message just moments after it was posted.
As ET previously reported, multiple reports claimed it was Harris that called things off with the "Wildest Dreams" singer.
"Taylor and Adam had no big blowout fight, but the romance just was not there anymore for them. Adam is the one that ended it," a source revealed to E! News. "It was all done in a very mature fashion. Taylor is pretty upset but they are still in communication."
"Taylor's heart was more in it than he was. He started to lose interest over the past few months, but really tried to not just break up," an insider added.
"There was no drama," another source insisted to People, adding that "no one cheated."
The breakup news comes less than two weeks after Harris was involved in a car crash that briefly landed him in the hospital. To hear more on Harris and Swift's split -- and see the sweet pics of the last time they were spotted together -- watch the video below.