Would this situation be entitled to EU261: non-EU to EU to non-EU F3 to final non-EU destination.

Initial flight did not originate in EU but it was not delayed either. The EU departing flight was delayed which resulted in missing connection at non-EU F3 destination that resulted in arriving at final non-EU destination approx 3.5hrs late. (These flights were on one ticket with 2 non-EU airlines)