Can I get 3 bettas, put dividers up, in 10 gallon tank?

I want 2 more Betta but keep them in a decent sized tank so Could I Just put 2 dividers up in a 10 gallon tank, use one filter and one heater still? There will be 3 sections in the tank that is about 3.34 gallons each? Is that good enough for a Betta? I know that 5 gallons is good for Betta but will 3.34 gallon be too?