New POV late into the story?

[K.P.]

It seems okay. It depends on how often this third character appears. Is this 3rd intergral or essential to the main story? does this 3rd character's VP eventually converge with the main 2? Though you introduced this character in ch3 and their VP doesn't appear until ch10, how many total chapters is this story? I wrote a story where the second character didn't appear until chapter 15 (out of 32) and he takes up about 38% of the story (whereas the MC is 45% and other minor characters were 17%). Just make sure your characters get ample time and that they're important to the storyline.

[Renee E]

Write it and see how it goes. You may have to tweak it and twiddle with it several times, but that's part of the writing process.

The only time you "can't" do something with your writing is when you can't get it to work. But you have to try — and retry and retry . . . before you know.

[Irene]

I agree with Renee, write it and see how it goes. I personally think you can do it a number of ways, you could leave her POV out until she has one relevant for the reader to be reading through or introduce her and give her little bits here and there (a few things, like maybe she sees the MC and has some comments on how he is doing something and declares that she would never work with an idiot like that, or how she would love to be part of his group of friends or something (not sure what sort of relationship they have at that point)). Just wing it and see how it turns out :)

[Dwayne]

Jen wrote: "I'd love your opinions on this."

Many years ago I wrote a novel in which the point of view changed frequently between a couple dozen characters or more. It was never published, but a few people read it and were not confused. The change in the point of view was always obvious. I think that's the key. Let the reader know immediately that the point of view is changing.