  In this paper, we generate an exact anisotropic gravastar model using
gravitational decoupling technique through minimal geometric deformation in the
framework of $f(\Re, {T}^{2})$ gravity. This novel model explains an
ultra-compact stellar configuration whose internal region is smoothly matched
to the exterior region. The developed stellar model satisfies some of the
essential characteristics of a physically acceptable model such as a positive
monotonically decreasing profile of energy density from the center to the
boundary and monotonically decreasing behavior of the pressure. The anisotropic
factor and Schwarzschild spacetime follows physically acceptable behavior. We
find that all the energy bounds are satisfied except strong energy condition
inside the ultra-compact stellar structure for the coupling constant of this
theory, which is compatible with the regularity condition.
