Which countries were unwelcome in Latin America?

The phrase "unwelcome in Latin America" would largely depend on the context to which you are referring. Throughout history, various foreign powers have been considered unwelcome in different parts of Latin America for various reasons.

In the colonial era, the indigenous people of Latin America regarded the Spanish and Portuguese as unwelcome invaders because they imposed their colonization. Much later, during the late 19th and early 20th centuries, European countries and the United States engaged in what has been described as "gunboat diplomacy," which often made their presence unwelcome. Their influence and interference in the region were seen as a manifestation of imperialism.

In the 20th century, during the Cold War, many Latin American countries viewed the presence of the United States as unwelcome, especially when the U.S. supported military coups or interventions that toppled democratically elected governments or interfered in the region’s politics to prevent the spread of communism—a policy highlighted by the Monroe Doctrine and the Roosevelt Corollary.

Additionally, in the modern era, certain countries or multinational corporations can be seen as unwelcome in Latin America due to their economic practices, which are sometimes viewed as exploitative or as contributing to environmental degradation.