We study a two scalar inert doublet model (IDMS 3 ) which is stabilized by a S 3 symmetry. We consider two scenarios: i) two of the scalars in each charged sector are mass degenerated due to a residual Z 2 symmetry, ii) there is no mass degeneracy because of the introduction of soft terms that break the Z 2 symmetry. We show that both scenarios provide good dark matter candidates for some range of parameters.