  The presence of current singularities in a quasisymmetric magnetic field is
explored. Quasisymmetry is shown effective in isolating Pfirsch-Schl\"{u}ter
singularities, to leading order, to a single magnetic surface resonant with the
helicity of the symmetry. The effects of pressure driven currents are analysed,
indicating that exclusion of this surface from the plasma volume reduces the
potential opening of islands, but does not generally eliminate them completely
due to higher order asymmetric geometric effects. These three-dimensional
effects are contained in quasisymmetry and indicate the complexity of finding
consistent solutions and their potential sensitivity. The $\delta$-function
current singularities show a distinct quasisymmetric behaviour only when the
higher-order Fourier content of $B$ is relevant for the resistive stability
parameter $D_R$ (not included in leading-order near-axis expansions). In such
scenarios, quasisymmetry proves advantageous, both in simplicity and avoidance
of amplification by low-order rational surfaces.
