We have studied a capillary condensation of a Lennard-Jones fluid in a slitlike pore filled with a quenched disordered hard-Sphere matrix using the Born-Green-Yvon (BGY) equation with the Fisher-Methfessel (FM) approximation. The solution of the replica Ornstein-Zernike (ROZ) equation in the Percus-Yevick (PY) approximation for a fluid in a homogeneous matrix is used as an input. The adsorption isotherms exhibit hysteresis loops for matrix-free and highly microporous matrix-filled slitlike pores.