The Paraguayan National Constitution recognises three categories of nationality. Natural nationality corresponds to people born within Paraguayan territory (ius soli) and to the children of a Paraguayan mother or father born abroad (ius sanguinis). Nationality by naturalisation may be requested by foreigners who meet the requirements set forth in Article 148 of the Constitution. Lastly, honorary nationality may be granted by Law of the National Congress to foreigners who have rendered eminent services to the Republic.
To acquire Paraguayan nationality by naturalisation, a foreigner must first apply for permanent residence. Once the residence has been obtained, the foreigner must reside in Paraguay for at least three years before petitioning the Supreme Court of Justice for Paraguayan nationality, and is subject to further regulations under Supreme Court Resolution No. 464/2007.
Naturalised Paraguayans can lose their nationality due to an unjustified absence from Paraguay for more than three years, or for the voluntary acquisition of another nationality. The loss of nationality must be declared by a competent judge.
Article 149 of the Paraguayan Constitution establishes that dual or multiple nationality may be admitted by international treaty or by reciprocity of constitutional rank among the States. This means that dual or multiple nationality is restricted to international treaties. Currently, Paraguay has a double nationality agreement with Spain and Italy.
According to Article 147 of the Constitution, no natural born Paraguayan will have their nationality revoked unless they explicitly wish it. Yet, Article 153 specifies that the adoption of another nationality outside of international treaties is ground for the suspension of citizenship.