We study the problem of stabilization a solution to 3D Navier-Stokes
system given in a bounded domain $\Omega$. This stabilization is carried
out with help of feedback control defined on a part $\Gamma$ of boundary
$\partial \Omega$. We assume that $\Gamma$ is closed 2D manifold without
boundary. Here we continuer investigation begun in [6], [7] where
stabilization problem for parabolic equation and for 2D Navier-Stokes system
was studied.