We constrain the distribution of merging compact binaries across the celestial sphere using the GWTC-3 catalog from the LIGO-Virgo-KAGRA Collaborations' (LVK) third observing run. With 63 confident detections from O3, we constrain the relative variability (standard deviation) of the rate density across the sky to be ≲16 % at 90% confidence assuming the logarithm of the rate density is described by a Gaussian random field with correlation length ≥1 0 ° . This tightens to ≲3.5 % when the correlation length is ≥2 0 ° . While the new data provides the tightest constraints on anisotropies available to date, we do not find overwhelming evidence in favor of isotropy, either. A simple counting experiment favors an isotropic distribution by a factor of Baniiso=3.7 , which is nonetheless an improvement of more than a factor of two compared to analogous analyses based on only the LVK's first and second observing runs.