The reaction of the nitro-substituted triplesalen ligand   with Mn(ClO₄)₂·6H₂O in CH₃CN in the presence of Et₃N and DMSO results in the formation of   (1) which has been characterized by elemental analysis, FTIR, UV-vis-NIR, ESI-MS, single-crystal X-ray diffraction, and magnetic measurements. The triplesalen ligand   provides three salen-like coordination environments bridged in a meta-phenylene arrangement by a phloroglucinol backbone. The coordination environment of each Mn^III ion is completed by two O-bonded DMSO molecules. The folding of the triplesalen ligand results in an overall dish-like geometry for the trication in 1. The magnetic characterization has been performed by temperature dependent magnetic susceptibility measurements and variable temperature-variable field (VTVH) magnetization data in order to determine both the exchange couplings J between the S_i=2 ion and the local zero-field splittings D_i. Simulations to the appropriate spin-Hamiltonian using a full-matrix diagonalization approach provided a weak antiferromagnetic interaction J=-0.30±0.05cm^-1 but a strong magnetic anisotropy expressed by D=-4.0±0.4cm^-1. The potential applications of 1 and forthcoming members of this new family of trinuclear manganese triplesalen complexes in molecule-based magnetism and homogenous catalysis are discussed.