That is often the published policy of a college. HOWEVER, when I individually asked to schools with such policy, every single admission office said that community college courses taken before high school graduation (of regular age) do not prevent freshman admission to their school, no matter what was the enrollment status and how many associate’s degrees were earned.
Matriculating to a 4 years college or getting a bachelor’s degree would be a different matter, even if it was before high school graduation.