  We investigate the IR dynamics of N=2 SUSY gauge theories in 3D with
antisymmetric matter. The presence of the antisymmetric fields leads to further
splitting of the Coulomb branch. Counting zero modes in the instanton
background suggests that more than a single direction along the Coulomb branch
may remain unlifted. We examine the case of SU(4) with one or two antisymmetric
fields and various flavors in detail. Using the results for the corresponding
4D theories, we find the IR dynamics of the 3D cases via compactification and a
real mass deformation. We find that for the s-confining case with two
antisymmetric fields, a second unlifted Coulomb branch direction indeed appears
in the low-energy dynamics. We present several non-trivial consistency checks
to establish the validity of these results. We also comment on the expected
structure of general s-confining theories in 3D, which might involve several
unlifted Coulomb branch directions.
