In this proceedings, we present the first measurements of identified light and strange particle ($\pi$, $K$, $\phi$) production in Au+Au collisions at $\sqrt{s_{NN}}=3$ GeV. Various models including thermal and transport model calculations are compared to data, which provide constraints to such models and indicate that the QCD matter produced in the 3 GeV fixed-target Au+Au collisons is considerably different from those at higher energies.