Hi, I am wondering if you have to do an internship year before entering a family practice residency (3 years)?

No you do not have to do an internship year before entering your 3 year residency for FP. The 3 years includes your intern year.

Thanks a lot!
So,I guess family medicine is the shortest residency, since the internship year is included?

correct,
the same goes for IM, Peds...
not sure if there are others 3 year residencies?