Can you keep your Timor-Leste citizenship when you become a U.S. citizen?
Allowed
Yes, in general
East Timorese citizens who become U.S. citizens keep their original citizenship, since dual nationality is accepted in East Timor.
What the law says
- Dual nationality is accepted in East Timor.
- Nationals born in East Timor cannot be deprived of their nationality but can voluntarily renounce it if they have acquired another nationality.
- Naturalized persons can lose East Timorese nationality for acts such as espionage, treason, or other actions jeopardizing state security, or for naturalization based on false or fraudulent documents.
- Naturalized persons can also lose nationality through serving in a foreign military or governmental capacity without approval of East Timorese authorities.
“Dual nationality is accepted in East Timor.”
What about the U.S. side?
The United States allows dual citizenship. At the oath ceremony you promise to renounce allegiance to other countries, but U.S. law does not make you formally give up your other passport. The question is only whether Timor-Leste lets you keep yours.
Source: East Timorese nationality law (Wikipedia, summarized on 2026-11-11). Laws change — confirm with the Timor-Leste embassy or consulate before your oath ceremony. This is not legal advice.
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