  We present an N=1 supersymmetric non-Abelian compensator formulation for a
vector multiplet in three-dimensions. Our total field content is the off-shell
vector multiplet (A_\mu{}^I, \lambda^I) with the off-shell scalar multiplet
(\phi^I, \chi^I; F^I) both in the adjoint representation of an arbitrary
non-Abelian gauge group. This system is reduced to a supersymmetric sigma-model
on a group manifold, in the zero-coupling limit. Based on this result, we
formulate a 'self-dual' non-Abelian vector multiplet in three-dimensions. By an
appropriate identification of parameters, the mass of the self-dual vector
multiplet is quantized. Additionally, we also show that the self-dual
non-Abelian vector multiplet can be coupled to supersymmetric Dirac-Born-Infeld
action. These results are further reformulated in superspace to get a clear
overall picture.
