We search for the charmless ${B}^{0}$ decay with final state particles $p\overline{\mathrm{\ensuremath{\Lambda}}}{\ensuremath{\pi}}^{\ensuremath{-}}\ensuremath{\gamma}$ using the full data sample that contains $772\ifmmode\times\else\texttimes\fi{}1{0}^{6}B\overline{B}$ pairs collected at the $\mathrm{\ensuremath{\Upsilon}}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. This decay is predicted to proceed predominantly via the $b\ensuremath{\rightarrow}s\ensuremath{\gamma}$ radiative penguin process with a high energy photon. No significant signal is found. We set an upper limit of $6.5\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}7}$ for the branching fraction of ${B}^{0}\ensuremath{\rightarrow}p\overline{\mathrm{\ensuremath{\Lambda}}}{\ensuremath{\pi}}^{\ensuremath{-}}\ensuremath{\gamma}$ at the 90% confidence level.
