R3 admissions are traditionally discouraged for international applicants due to the hassle of getting visas, funding, and accommodation in a 2-3-month timeline. However, if you consider the tendency of local applicants to wait it out for Round 1, a small window opens for the self-funded and the permanent residents. Even by the most conservative estimates, 10-15% of the class is reserved for Round 3 applicants. The outbreak of Coronavirus has skewed the class representation in favor of Round 2 waitlisted applicants and those small groups of international applicants from India, Kuwait, Hong Kong, and Singapore not adversely affected by the virus.
Last Minute GMAT Test takers
Since the deadlines for Round 3 is during April first week, test takers who have appointments during March - a scenario that most R2 reject applicants deploy would be the most affected. As of 6th March 2020, GMAC has announced that testing has been suspended till March 31st ,2020, till further notice in Mainland China, March 25th for Italy, and March 14th for Kuwait. Test centers in Hong Kong have remained unaffected by the pandemic apart from a few special restrictions for test-takers (travel history and test for flu-like symptoms)