Persons born in the territory of the Republic are natural Paraguayans, subject to the constitutional exception for children of persons in the service of a foreign government.
Sources: Paraguay Constitution — nationality provisions (signed text)
Children of a Paraguayan mother or father born abroad are natural Paraguayans when they settle permanently in the Republic, or when a parent was in the service of the Republic at the time of birth abroad.
Sources: Paraguay Constitution — nationality provisions (signed text) · Paraguay Repatriados — inclusión a la identidad nacional
Foreign adults may seek Paraguayan nationality by naturalization after a constitutional minimum of three years of residence in the national territory, majority, good conduct, and exercise of a profession, trade, science, art or industry, or ownership of property in the country, subject to the statutory process.
Sources: Paraguay Constitution — nationality provisions (signed text) · Paraguay Dirección General de Migraciones