Missing a scheduled visa appointment for admission to the U.S. can lead to various setbacks and complications. It can cause delays in your travel plans, potentially affecting your ability to start your academic program on time or participate in orientation activities. Issues like limited appointment availability, expiration of required documents, and the need for reapplication might result from missing the visa appointment. It's crucial to adhere to the instructions provided by the U.S. embassy or consulate, set reminders, and ensure you have all necessary documents to avoid missing the appointment. If you do miss the appointment, promptly communicate with the embassy or consulate to explore rescheduling options and minimize the impact on your academic plans.