Korver suffered the injury when Cleveland Cavaliers guard Matthew Dellavedova fell on his ankle during the Hawks' loss in Game 2 of the Eastern Conference finals.
Korver was diagnosed with a severe ankle sprain after undergoing an MRI scan on Saturday. But, after speaking to a specialist in New York, it was determined that surgery would be the best option for Korver.
"There was some hope that surgery may not be required," coach Mike Budenholzer told reporters after the Hawks were swept 4-0 by the Cavaliers. "But with additional information and additional testing he will need surgery to get him back to where we want him. We all want what's best for Kyle and look forward to having him back."
It is not yet clear how long Korver will be out for and whether he will recover in time for the start of the next NBA season.
Korver averaged 11.1 points, 5.0 rebounds and 2.4 assists during the playoffs and maintained a true shooting percentage of 55.7.