We reinvestigate contributions of scalar leptoquarks in $R_{D^{(\ast)}}$
anomalies and use constraints from the branching fractions of $B\to K^{(\ast)} \nu \bar \nu$ decays.
Then, we update the constraints on parameter space and find which scalar leptoquarks remain viable and
consistent with low- and high-energy flavour physics constraints. We comment on the implications of such selection.