Limit form submission

Hi, 

I am trying to use Form (or Forms Pro). Just wondering what would be the best way to limit form submission? 

I have branches (think about it as groups and subgroups) so for each subgroup value I want only 3 submissions. Is this possible using Forms or Forms Pro + Flows?

In Forms Pro there is a Stop limit but that applies to whole form not each subbranch value.

I am open to any suggestion using Flows, Power Apps, Forms etc

Thanks