AbstractThis research investigates the unconventional photon blockade in a hybrid optomechanical system with an embedded spinātriplet state. The selfāhomodyning interference between squeezed quantum fluctuations produced by the emitter and the coherent fraction from the driving laser results in twoāphoton suppression. Analytical solutions of the correlator equation and numerical simulations of the master equation reveal that modulated mechanical dissipation plays a crucial role in achieving strong singleāphoton blockade. In contrast to conventional cavity optomechanical systems, a secondāorder correlation function of can be achieved with weak singleāphoton optomechanical coupling. By combining unconventional and conventional antibunching, the hybrid system achieves the convergence of maximal photon population, twoāphoton interference, and suppression of higherāorder correlations. Additionally, the influence of the thermal noise on photon blockade is investigated, demonstrating greater robustness of the secondāorder correlation under weaker phononāspin coupling.