Bow to Royalty
Just facts
I'd say in this situation, when it becomes pretty clear that she isn't interested...anything beyond that is harassment. In this situation, given just the facts that you stated, I'd say that it's VERY clear that this woman is not interested and I can't think if any other realistic way it can be looked at. You asked her out 3 times. And 3 times she has told you no. She didn't say 'Oh but I'm free next weekend.' Or 'How about we grab lunch during the week?' Etc, etc, etc.
The picture seems pretty clear to me.
I can definitely see that, but should there be some responsibility on the woman's side to say she isn't interested? Like in this situation she's intentionally not expressing she's not interested. She's dropping hints, and I'd pick up on them. But I can't speak for every hopeful guy out there.