hesitance,hesitancy,hesitation

hesitancy is a noun, it means If you are hesitant, you do not do something
immediately or quickly because you are nervous or not certain.

hesitation is also a noun, but it means the act of pausing before doing
something, especially because you are nervous or not certain.

sorry, i think hesitance is not exisit.

Hesitance is a noun, this word does exist. Hesitancy and hesitation are both nouns too. They all mean that you cannot make a decisiondue to uncertainty or scruple,etc.