evidence: Isla Suárez facts for kids The Ilha de Guajará-Mirim (Brazil) or Isla Suárez (Bolivia) is one of the world's many disputed territories. The island lies in the Rio Mamoré in Amazon, which defines part of the boundary between the Bolivian department of Beni and the Brazilian state of Rondônia in the Amazon. The island's sovereignty is the object of passive contention between the governments of Brazil and Bolivia, which administer it de jure. [...] The Government of Brazil agreed with the Government of Bolivia to re-examine the issue of the legal status of the island of Guajará Mirim (Isla Suárez).