[3] He then studied international relations in Paris before returning to Bolivia, where he chaired the department of sociology at Oruro Technical University.

A proponent of bilateral relations with socialist and communist nations, Garrett was appointed as Bolivia's first Ambassador to the Soviet Union from 1969 until 1973.

[3] Just one month later, Garrett, along with former President Víctor Paz Estenssoro, another member of the MNR, were forced into exile in January 1974.

[3] He won re-election to the Senate in 1980, but was once again forced into exile from 1980 until 1982 during the dictatorship of President Luis García Meza Tejada.

Garrett, who served as vice president from 1985 to 1989, established the Universidad Andina Simón Bolívar in Sucre during his tenure.