There are only two South American countries which does not share a border with Brazil. Those countries are Chile and Ecuador.
The South American countries of Chile and Ecuador do nor border Brazil.
Argentina, Bolivia, and Peru border Chile.
Chile shares its border with Argentina, Bolivia and Peru.
Venezuela borders Brazil, but Chile doesn't. Chile and Equador are the only two countries in South America that don't border Brazil.
Paraguay, Brazil, Uruguay, and Chile
colombia portirico
Ecuador and Chile.
Ecuador and Chile.
Argentina
Peru and Chile
Chile and Colombia border Peru.