Definition of Foreign Service Level 3 ability:
Interagency Language Roundtable, level 3 (Professional Proficiency)
Pronunciation: Sometimes foreign but always intelligible
Grammar: Good control of most basic syntactic patterns; always conveys meaning accurately in reasonable complex sentences
Vocabulary: Adequate for participation in all general conversation and for professional discussions in a special field
Fluency: Rarely hesitant; always able to sustain conversation through circumlocution
Comprehension: Understands most of what is said to him; can follow speeches, clear radio broadcasts, and most conversations between native speakers, but not in great detail.