I applied to 4, interviewed at 2, and got in one so I personally believe 3 is cutting it really close, even if your stats are really good. You see sometimes it may not come down to stats, there are numerous of reasons as to why an interview with an OT school may not go well, also you may really be turned off to the area in which you would be going to school at and I am not saying you gotta love the place or even like it but if you feel you can't even tolerate a certain area for a couple years of school due to the climate, the environment, the people, etc. then I would advise you to seriously consider not going there cause that is much more stress you don't want during the rigorous OT schooling ahead. Considering aspects such as these is why applying to 4+ schools if possible would be profitable.