  We analyze the critical behavior of isotropic systems with dipole-dipole
interaction by renormalization-group methods in fixed space-time dimensions.
Working in three-dimensional theory we analytically find three-loop expressions
for critical exponents in the limit of dominating dipole-dipole forces.
Resummation of the series obtained provides numerical values close to
$O(3)$-theory predictions, justifying the applicability of such a simplified
model to systems with strong dipole-dipole interaction.
