Due to their tailorable deformation behavior, metastable CrMnNi steels are promising candidates to overcome the strength-ductility tradeoff. However, the application of traditional process routes is rather limited with respect to a tailored microstructure. The utilization of additive manufacturing, in turn, allows for a higher degree of freedom as it enables a voxel-wise change of parameters and, therefore, an adjustment of microstructure and mechanical properties. In the present study, metastable CrMnNi steels with varying nickel contents and, thus, different phase stabilities are manufactured by laser-beam direct energy deposition (DED). The complex thermal history, i.e., high cooling rates and recurrent heating and cooling cycles, imposed by the DED process are known to promote unique microstructures being different to conventional material conditions, which will, in turn, affect the mechanical properties. The CrMnNi steels with different phase stabilities are analyzed with respect to microstructural evolution after the manufacturing process as well as the deformation behavior under quasi-static loading. Due to the application of test temperatures from cryogenic to elevated under quasi-static loading, different deformation mechanisms are predominant. The findings are compared with conventionally and powder-bed-fused counterparts from literature.