Nikitha16
I want to know how many people get called for an interview in round 3 for ISB interview and what is the acceptance rate in round 3 for ISB
Before answering your question let me tell you how ISB works to decide whether to give an invite for the interview or not. ISB, while reviewing your profile/application, generates a profile score based on your academics, work profile, essays, Recommendations, etc. For this profile score, Adcom decides a cut-off and it is not shared by them if they generate new cut-offs every year, or every round or they go along with the same cut-offs without changing it.
Now coming to R3 applications: Most of the seats that ISB has are filled by this time- to be very honest. ISB however is still on the lookout for good candidates for their upcoming cohort and that is the reasoning behind having the R3. Even in R3, the profile score cut off is the deciding factor behind getting an interview call. Again, ISB does not disclose if this cutoff is the same or different for different rounds. Logically it is the same for all rounds in a given admissions cycle, at the least, and let's assume this hypothesis is correct for the rest of this argument. So if you apply in R3 and you cross that profile score you will get an invite to the interview.
Finally, the interview to admit conversion is 3:1 (reject/waitlist: admit). ISB does not publish the R3 acceptance rate as such and no one else outside ISB can let us know more about it.
Overall to answer your question: ISB does not publish what you are asking for in the public domain. So, whatever answers you will get will most likely be speculation and not the exact figures- unless my research on the school is not exhaustive enough. You can try reaching out to the PGP admissions team via email for this info though.