Cross-country advertising increasingly shapes how global brands communicate values, influence consumer behavior, and promote products across diverse geopolitical, cultural, and regulatory environments. Ethical concerns arise when advertising practices conflict with cultural norms, exploit data, misrepresent identity, manipulate vulnerable groups, or bypass local regulatory frameworks. This paper analyzes global ethical standards for cross-country advertising with comparative analysis of policy frameworks from the EU, USA, GCC, ASEAN, and African Union. Findings reveal that ethical advertising requires culturally sensitive messaging, transparent data governance, truthfulness, inclusivity, and compliance with multi-jurisdictional legal systems. A cross-country ethical compliance model is proposed to guide brands operating across borders.