HBS posted an update on its blog for Round 3 applicants:
“On Monday, April 22, probably at noon Boston time, every Round 3 applicant will get an email from us. You’ll receive either an invitation to interview or a “Sorry, we can’t offer you a place in the class” notification.
Interviews will be conducted on campus on May 2, 3 and 6. Those interviewing on campus will have an opportunity to do tours, have lunch, and meet with students. We will have limited spots available in Palo Alto on May 1 and 3. Candidates with real logistical challenges will be offered Skype interviews.”
In an earlier post, HBS stated that they will not accept GMAT or GRE scores submitted after the deadline, but recommendations will still be accepted. Harvard confirmed that there are spots available in the class and they will accept Round 3 applicants.