While sympatric with slow lorises, pygmy slow lorises are confined to a somewhat smaller geographical area. They are found in the countries of Vietnam, Laos, and Cambodia. Where they do occur, members of this species are usually found in thick foliage deep in tropical rainforests. They are also sometimes found in bamboo groves.
Sparse distribution, coupled with a history of military activity and political upheaval in its home range, has taken its toll on this species. Pygmy slow lorises are the most endangered of all the non-lemur prosimians. During the Vietnam War, much of their habitat was destroyed and they nearly disappeared from that country altogether. Recent studies, however, suggest that the animal is making a comeback and that its population in the country of Laos may be thriving. Pygmy slow lorises are not hunted for food, but specimens are collected for sale as pets and for use in traditional medicine. They can frequently be found on sale at markets in Vietnam.