98-09E

Within the massive field theoretical renormalization group approach the expressions for the $\beta $- and $\gamma $- functions of the anisotropic $mn$-vector model are obtained for general space dimension $d$ in three-loop approximation. Resumming corresponding asymptotic series, critical exponents for the case of the weakly diluted quenched Ising model ($m=1$, $n=0$), as well as estimates for the marginal order parameter component number $m_c$ of the weakly diluted quenched $m$-vector model are calculated as functions of $d$ in the region $2 \leq d <4$. Conclusions concerning the effectiveness of different resummation techniques are drawn.