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The title compound, C10H6ClNO2, has a dihedral angle of 46.46 (5)° between the benzene and maleimide rings. A short intermolecular halogen–oxygen contact is observed, with a Cl...O distance of 3.0966 (13) Å. Both CO groups are involved in two C—H...O interactions, which gives rise to sheets parallel to (100). In addition, these sheets exhibit a π–π stacking interaction between the benzene and maleimide rings [mean interplanar distance of 3.337 (3) Å].