Weak three-dimensional coupling of Heisenberg quantum spin chains in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">SrCuTe</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:math>

The magnetic Hamiltonian of the Heisenberg quantum antiferromagnet SrCuTe$_{2}$O$_{6}$ is studied by inelastic neutron scattering technique on powder and single crystalline samples above below transition temperatures at 8 K 2 K. high temperature spectra reveal a characteristic diffuse corresponding to multi-spinon continuum confirming dominant spin-chain behavior due third neighbour interaction J$_{intra}$ = 4.22 meV (49 K). low exhibits sharper excitations energies 1.25 which can be explained considering combination weak antiferromagnetic first nearest interchain coupling J$_1$ 0.17 (1.9 K) even weaker ferromagnetic second J$_2$ -0.037 (-0.4 or -0.11 (-1.3 J$_6$ 0.16 (1.85 giving rise long-range order spin-wave energies. These results suggest that highly one-dimensional system with three mutually perpendicular spin-chains coupled in addition presenting contrasting scenario from frustrated hyper-hyperkagome lattice (equally strong J$_2$) found iso-structural PbCuTe$_{2}$O$_{6}$.