The 2020 All-Star Game was scheduled for Tuesday, July 14 in Los Angeles. The city of Atlanta and the Atlanta Braves were already looking toward the next year, where the Midsummer comes to the South for the first time since 2000.
The phrase "was scheduled" is intentional. It is still a point of speculation as to what might happen, but almost all commentators are in agreement: that July 14 date is almost certainly not going to be met.
The fate of the Midsummer Classic will depend in part on how long the coronavirus shutdown lasts — the longer it lasts, the more things that will get canceled.