A research team reports the discovery of COSMOS-74706, an unlensed barred spiral galaxy at a spectroscopic redshift z=3.1591 (about 2 billion years after the Big Bang). Using deep multi-band imaging from the Hubble Space Telescope and the James Webb Space Telescope, the study finds disk-like morphology and a clear spiral structure. An elongated central feature is observed aligned between the spiral arms, most noticeably in JWST/NIRCam filters F200W, F277W, and F356W. The authors support the presence of a stellar bar with three independent analysis methods: residuals from galaxy light-profile fitting, isophotal ellipse-fitting that shows bar-like changes in ellipticity and position angle, and Fourier decomposition that detects a strong central bisymmetric mode. The team also uses archival Keck/MOSDEF spectroscopy overlapping a blue clump to infer a robust redshift and confirm that the barred structure is at the same redshift as the main spiral. In a companion analysis, they perform stellar population modeling to estimate the star-formation history and physical properties. The galaxy has a constrained total stellar mass of log(M*/M☉)=10.63±0.13. The bar region contains roughly 30% of the stellar mass but contributes about 8% of recent star formation, and the older stellar ages in the bar region provide tentative evidence consistent with bar-related quenching.