  We present an exact diagonalization study on layered $J_{1}-J_{2}$
antiferromagnetic Heisenberg spin model to examine the role of frustration
induced by inplane next-nearest neighbor coupling $J_{2}$, in presence of
interlayer antiferromagnetic coupling $J_{\perp}$. A finite lattice of 24 spins
in layered geometry of $(4\times 3)\oplus (4\times 3)$ is considered and the
resulting Hamiltonian matrix diagonalized using Davidson iterative algorithm to
obtain the ground and a few low-lying excited states. The lattice size ($24$
spins with Hilbert space dimensionality of $2704156$ in $S_{z}^{tot}=0$
subspace) has been kept relatively small because of the large number of runs
required to sample $J_{1}-J_{2}-J_{\perp}$ parameter space. Quantities like
spin-gap, Shannon entropy, spin-spin correlation, static spin structure-factor,
magnetic specific-heat and magnetic susceptibility are calculated for various
values of spin-spin coupling parameters. With increase in interlayer coupling,
the system is driven to states with long range order and the interval of
quantum paramagnetically disordered state, sandwiched between N\'{e}el and
collinear ordered states, narrows on the scale of inplane frustration
parameter.
