While antiferromagnets have been proposed as components to limit stray magnetic fields, their inability to be spin polarized inhibits their use in spintronic devices. Compensated ferrimagnets are a unique solution to this dilemma since they have zero net moment, but their nonsymmetric density of states allows achievement of full spin polarization. Density functional theory predicts Mn3Al in the D03 structure to be fully compensated and retain half-metallicity at room temperature. In this work, 50 nm Mn3Al thin films were synthesized using molecular beam epitaxy and annealed at various temperatures in order to investigate their magnetic properties. Magnetometry measurements confirmed the high Curie temperature of 605 K. Polarized neutron reflectometry (PNR) indicated a low net magnetic moment, along with depth profiles of the structure and magnetization. From the PNR data, we extract a saturation moment of 0.11 ± 0.04 µB/f.u., confirming the nominal zero moment present in these thin films.