  Using a semi-classical model, we study the formation of highly excited
neutral fragments during the fragmentation of $\mathrm{H_3^+}$, a two-electron
triatomic molecule, driven by an intense near-IR laser field. To do so, we
first formulate a microcanonical distribution for arbitrary one-electron
triatomic molecules. We then study frustrated double and single ionization in
strongly-driven $\mathrm{H_3^+}$ and compute the kinetic energy release of the
nuclei for these two processes. Moreover, we investigate the dependence of
frustrated ionization on the strength of the laser field as well as on the
geometry of the initial molecular state.
