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The evolution of rest-frame B-band luminosities, stellar masses, and numberdensities of field galaxies in the Hubble Deep Field North and South arestudied as a function of rest-frame B-band morphological type out to redshiftsz~3 using a sample of 1231 I < 27 galaxies with spectroscopic and photometricredshifts. We find that the co-moving number, and relative number, densities ofellipticals and spirals declines rapidly at z > 1, although examples exist at z> 2. The number and number fraction of peculiar galaxies consistent withundergoing major mergers rises consistently at redshifts z > 2. Throughsimulations we argue that this decline is robust at the 4 sigma level againstmorphological k-corrections and redshift effects. We trace the evolution ofrest-frame B-band luminosity density as a function of morphology out to z~3finding that the luminosity density is steadily dominated by peculiars at z >1.5 with a peak fraction of 60-90% at z~3. By z~0.5 B-band luminosity fractionsare similar to their local values. The stellar mass density follows a similartrend as the luminosity density, with some important exceptions. At highredshifts, z > 2, over 60-80% of stellar mass is attached to peculiars, whileat z< 1, 80-95% of stellar mass is attached to ellipticals and spirals. Incontrast to the luminosity density, the stellar mass density of ellipticals isgreater than spirals at z < 1.5, and the stellar masses in both types growtogether at z < 1, while number densities remain constant. (abridged)Comment: 33 pages, 17 figures, accepted to the Astrophysical Journa

The Luminosity, Stellar Mass, and Number Density Evolution of Field Galaxies of Known Morphology fromz= 0.5 to 3