My house has 4 bedrooms and 3 bathrooms. If you ask me, it's a bit too little since now people are sharing bathrooms, and when someone won't respect that you're taking a crap and wants their makeup out of the bathroom you share, you'll wish you had a bathroom all to yourself. I sat down and talked to my parents about it, and I finally got the downstairs guest bathroom all to myself and my own room, and now my little brother has to feel the pain of sharing a bathroom with my older sister. I once for 7 years had to share a bathroom but now I finally have my own privacy.
In conclusion, no, 3 bathrooms for a 3 bedroom house is not too much at all.