The present work is focused on understanding the role of Ruthenium (Ru) and Yttrium (Y) on the superconducting properties of the A15 Nb3Sn intermetallic compound. Ru and Y shows different solubility limit within the Nb3Sn matrix. Ru and Y-doped Nb3Sn superconducting alloys were prepared through mechanical alloying (MA) route followed by sintering using Field Assisted Sintering Technique (FAST). Analysis by X-ray diffraction demonstrates a significant decrement in crystallite size up to 0.5 wt% for the Ru-doped Nb3Sn followed by a significant increment when doping level reaches 1 wt% Ru. This could be the combined effect of structural disorderliness and Ru dissolution within the Nb3Sn matrix. While a significant increase in the crystallite size is observed for 0.5 wt% Y-doped Nb3Sn and no further change up to 1 wt% Y. This change could be a result of limited solubility of Y within the Nb3Sn matrix. Meanwhile, excessive Y plays an important role in the formation of additional flux pinning centers. The critical current density (Jc) shows a significant increase for all the Y-doped Nb3Sn alloys by a factor of 29 % due to the formation of Y2O3 from the residual Y, which is assumed to serve as additional flux pinning center. The Y2O3 particles was also considered as a possible cause of pinning down of grain boundaries in addition to NbO leading to grain refinement through Zener pinning. Ru-doped Nb3Sn alloys also exhibit an increase in Jc compared to pristine Nb3Sn, but only in concentrations up to 0.5 wt% Ru. At higher applied field, even 1 wt% Ru shows slight increase in Jc than pristine Nb3Sn. Y-doped samples showed superior functional properties.