Almost. It should be "I SAW the actor three times".

no, it is incorrect. in order to write a correct sentence, it is necessary to know whether you saw the actor 3 times during your visit to America (When I was in America, I saw the actor three times.) or you had seen him for 3 times before the visit (Before I went to America, I had seen the actor three times)

You are referring to something in the past, correct? It should be: When I went to America, I saw the (same) actor three times!