Caged recombination is observed when the binary I-2-Ar complex is excited to energies above the B state dissociation limit. The recombination mechanism has been the subject of several previous investigations. Two alternative models have been proposed; Nonadiabatic recombination in a T-shaped complex, or adiabatic recombination in linear I-2-Ar. In the present study, fluorescence depletion measurements were used to test these models. Fluorescence resulting from caged recombination could not be depleted using the well-known resonances of T-shaped I-2-Ar. Instead, depletion via a diffuse band system previously assigned to the linear I-2-Ar was observed. These results are consistent with the adiabatic recombination model. Geminate recombination of I-2 in a He supersonic expansion is also reported.