  According to the standard lore only single monopoles contribute to the
superpotential on the Coulomb branch of 3D ${\mathcal N}=2$ SUSY gauge
theories. However we argue that multi-monopole configurations can also generate
superpotential terms in the presence of squark VEVs on the mixed Higgs-Coulomb
branch. The new ingredient is the confinement of monopoles via Nielsen-Olesen
flux tubes. Such confined multi-monopoles will yield a pre-ADS superpotential
which depends both on the local Coulomb moduli and matter superfields but has
no fractional powers. Once the lifted moduli are integrated out the familiar
ADS superpotential is obtained. Our results demonstrate the important role
multi-monopoles can play in generating non-perturbative effects and also sheds
light on the still somewhat mysterious dynamical origin of the general 4D ADS
superpotential.
