Jabarkan Foreign defence relations dari Forcas Defensa Timor Lorosa'e dalam bahasa tetun

Foreign countries play a key role in supporting the F-FDTL and are providing security in East Timor until the Timorese security forces are ready to resume this responsibility. The United Nations Integrated Mission in Timor-Leste (UNMIT) is tasked with supporting the East Timorese government and security institutions, including the F-FDTL. UNMIT was established on 25 August 2006 and replaced the United Nations Office in Timor Leste (UNOTIL). As at 30 June 2010 UNMIT had a strength of 1,466 uniformed personnel, including 1,434 police and 32 military observers. These personnel were supported by 354 international civilians, 907 local civilian workers and 176 UN volunteers. UNMIT includes a Military Liaison Group which maintains teams in Dili, Baucau, Maliana, Suai, and Oecussi. These teams collect information on security issues for UNMIT and liaise with both the East Timorese Border Police and the Indonesian military in border districts.

UNMIT is supported by an Australian-led International Stabilisation Force (ISF). The ISF was deployed to East Timor in late May 2006 and currently includes units from the Australian Defence Force and the New Zealand Defence Force. The main element of the ISF is the ANZAC Battle Group, which has a strength of about 400 Australians and 150 New Zealanders as at August 2010.

The presence of UN police and Australian troops was a key issue in the 2007 East Timorese presidential election. The winning candidate, José Ramos-Horta, backed the presence of foreign forces and told rallies that he would like these forces to remain for at least five years. Most other candidates called for the UN and ISF to withdraw as soon as possible, arguing that their presence limits East Timor's sovereignty. Despite the differing views on how long the UN and ISF should remain in East Timor, all the parties regard the presence of foreign peacekeepers as being necessary until the F-FDTL and PNTL are ready to take responsibility for the country's security.

While the UN has historically been reluctant to engage with the F-FDTL, several bilateral donors have assisted the force's development. Australia has provided extensive training and logistical support to the F-FDTL since it was established, and currently provides advisors who are posted to the F-FDTL and Ministry of Defence and Security. Portugal also provides advisors and trains two naval officers each year in Portugal. China has provided US$1.8 million in aid to the F-FDTL since 2002 and agreed to build a new US$7 million headquarters for the force in late 2007. East Timor is one of Brazil's main destinations for aid and the Brazilian Army is responsible for training the F-FDTL's military police unit. The United States also provides a small amount of assistance to the F-FDTL through the State Department's International Military Education and Training Program. While Malaysia has provided training courses and financial and technical aid, this assistance was suspended after the 2006 crisis. Under current arrangements Portugal provides the F-FDTL with basic and advanced training while Australia and other nations provide training in specialized skills.