TG3A Full Form. Full Meaning of TG3A Find long form and abbreviation, slang or definition of TG3A. What does TG3A mean? What does TG3A stand for? We are providing world largest and most comprehensive acronyms, names, abbreviations database directory on the Internet. Our data base contains more than 8,00,000 terms abbreviations and acronyms. You can also search unique terms more than 4,00,000 general Comprehensive words.