The importance of diagnosis in Orthodontics cannot be over emphasized. Every case which we come across is a challenge by itself. A thorough understanding of the fundamental principles of diagnosis is the key to correct treatment planning in Orthodontics. Pseudo class III malocclusion is one such situation, which if identified early, can be successfully treated. In this text book every effort has been made to make the topic understandable to every beginner in the field of Orthodontics. A detailed description of this condition along with a case report has been presented.