There were only two: Alcino Pereira in track & field, in the men's 5,000m race (T38 category); and Mateus Lukas in men's powerlifting, in the up to 48 kg category.
[1] Formally recognised in 2002, Timor-Leste participated in the 2004 Summer Olympics, but not in the Paralympics that same year.
Timor-Leste, as such, made its Paralympic Games début at the 2008 Summer Paralympics in Beijing, with a single representative (Lily Costa Silva) in powerlifting.
Competing in the women's up to 52 kg category, Costa Silva failed to successfully lift a weight, and did not record a mark.
This article summarising a nation's participation in the Paralympic Games is a stub.