International advertising enables firms to communicate brand value across borders, cultures, and media systems. However, it also presents complex ethical dilemmas arising from cultural diversity, unequal regulatory enforcement, economic disparities, and the global reach of digital media. Advertising messages that are acceptable in one country may be perceived as misleading, offensive, or exploitative in another. This research paper critically examines ethical dilemmas in international advertising by integrating perspectives from marketing ethics, cross-cultural communication, and international business. A conceptual framework is proposed to explain how ethical conflicts emerge and how firms can systematically address them. The paper discusses major ethical dilemma categories, strategic responses, and managerial implications, and concludes with future research directions in digital and AI-driven global advertising ethics.