Leak and Lose Act of 2023 This bill establishes federal criminal offenses for acts involving the concealment, removal, or destruction of an opinion or draft opinion of the Supreme Court before it is published. Specifically, the bill prohibits the willful and unlawful (1) concealment, removal, mutilation, obliteration, or destruction of an opinion or draft opinion; (2) attempt to conceal, remove, mutilate, obliterate, or destroy an opinion or draft opinion; and (3) taking or carrying away (including electronically) of an opinion or draft opinion with the intent to conceal, remove, mutilate, obliterate, or destroy. An individual who violates the prohibition is subject to a $5,000 fine and, if applicable, the permanent forfeiture of his or her admission to federal courts for the practice of law.