I think as mentioned in this thread there's quite a lot of pov switching even in mg, but if it's done, it should be clear and well set up. Also, there's always a question with switching to different characters, and that is whether the reader wants to stay with the one they're with or if they're okay with switching.
Maybe because you just put the third pov in, it's still a bit jumpy and not quite set up. In a way, if you want to keep the new pov, you may need to embrace it and go all in, and make sure it's done as well as possible. But as to deciding whether to use it or not at all, that's got to be your decision. I think confusion can be solved--but there's the question of whether a scene in another pov takes readers away from the heart of the story.
If it's hard to decide too, you can also take a long hard look again to see if what you solved with a pov switch can also be solved in another way. I think too the genre and the whole style of the story matter a lot, the voice and so on. Hmm, hard question!