  In this paper we present the Hietarinta Chern-Simons supergravity theory in
three space-time dimensions which extends the simplest Poincar\'e supergravity
theory. After approaching the construction of the action using the Chern-Simons
formalism, the analysis of the corresponding asymptotic symmetry algebra is
considered. For this purpose, we first propose a consistent set of asymptotic
boundary conditions for the aforementioned supergravity theory whose underlying
symmetry corresponds to the supersymmetric extension of the Hietarinta algebra.
We then show that the corresponding charge algebra contains the
super-$\mathfrak{bms}_{3}$ algebra as subalgebra, and has three independent
central charges. We also show that the obtained asymptotic symmetry algebra can
alternatively be recovered as a vanishing cosmological constant limit of three
copies of the Virasoro algebra, one of which is augmented by supersymmetry.
