When faced with unexpected questions in IELTS Speaking Part 3, stay calm and take a moment to gather your thoughts. Begin by rephrasing the question to give yourself time to think. If unsure, express your uncertainty and then provide a reasoned answer. Practicing with an IELTS mock test exposes you to a variety of questions, helping you get comfortable with thinking on your feet. The key is to stay composed and focused, turning any question into an opportunity to showcase your speaking skills.