In the title compound, C(15)H(11)NO(3), the dihedral angle between the meth-oxy-benzene and isoindole ring systems is 70.21 (3)°. The meth-oxy C atom is close to being coplanar with its attached ring [deviation = 0.133 (2) Å] and is oriented away from the isoindole moiety. In the crystal, inversion dimers linked by pairs of C-H⋯O hydrogen bonds generate R(2) (2)(10) loops. Further C-H⋯O inter-actions lead to (010) infinite sheets and weak aromatic π-π stacking [centroid-centroid separations = 3.6990 (10) and 3.7217 (10) Å] is also observed.