The No tears left To Cry singer and Davidson started dating in May, announcing their engagement just three weeks later in June.
Grande recently expressed that she was struggling emotionally following the sudden death of her ex-boyfriend Mac Miller. Posting a string of personal messages to Twitter, saying she needs a break from the public spotlight and asking "can i pls have one okay day. just one. pls."
The couple, who were just spotted together last week, has not yet spoken out about the split.