  We study supersymmetric Wilson loops in $d=3$, $\mathcal{N}=3$ harmonic
superspace, leading to a construction of a supersymmetrized generalization of
the $\frac{1}{3}$-BPS Wilson loop for $\mathcal{N}=3$ gauge theories. This also
includes a generalization of the $\frac{1}{6}$-BPS loop for ABJM theory. We
perform a 'one-loop' computation of the vacuum expectation value of this
operator directly in superspace and compare with the known $\mathcal{N}=2$
localization results at large $N$. This comparison also lets us identify
certain fermionic contributions that do not receive any subleading corrections.

High Energy Physics - Theory