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In a recent paper, Tayal et al. [{\em Astrophys. J. Suppl.} {\bf 2019},{\emph 242}, 9] have reported results for energy levels, radiative rates(A-values) and effective collision strengths ($\Upsilon$) for transitions amongthe 198 levels of Si-like S~III. For the calculations they have adopted themulti-configuration Hartree-Fock (MCHF) code for the energy levels andA-values, and B-spline $R$-matrix (BSR) code for $\Upsilon$. Their reportedresults appear to be accurate for energy levels and A-values, but not for$\Upsilon$. Through our independent calculations by adopting the flexibleatomic code (FAC), we demonstrate that their reported results for $\Upsilon$are underestimated, by up to a factor of two, and at all temperatures,particularly for the allowed transitions, but some forbidden ones too.Additionally, for transitions involving the higher levels the behaviour oftheir $\Upsilon$ results is not correct.

Electron Impact Excitation of S III: an Assessment