Will getting a 3 affect my chances of going to an Ivy League?

I have a perfect academic record thus far, and was wondering if getting a 3 on an upcoming AP exam in Spanish would reduce ALL of my chances of going to an Ivy League.

Also, I have been studying rigorously, but have not been making progress (also have other AP exams like Calc BC and Stats coming up)

I feel confident getting a 3 as I got a 3 on two of my practice tests, but will getting a 3 hurt my chances?

No

Ap tests are used for placement, not admission. It would only matter for a British university.