You didn't state what your question is, so I'm guessing that it's "What is the probability of the spinner landing in region 3 on three consecutive spins?"
P(3 spins in region 3) = P(1 spin in region 3) · P(1 spin in region 3) · P(1 spin in region 3)
What is the probability of a single spin landing in region 3?
If you have a different question, please state what it is.