  We have entered a new era where integral-field spectroscopic surveys of
galaxies are sufficiently large to adequately sample large-scale structure over
a cosmologically significant volume. This was the primary design goal of the
SAMI Galaxy Survey. Here, in Data Release 3 (DR3), we release data for the full
sample of 3068 unique galaxies observed. This includes the SAMI cluster sample
of 888 unique galaxies for the first time. For each galaxy, there are two
primary spectral cubes covering the blue (370-570nm) and red (630-740nm)
optical wavelength ranges at spectral resolving power of R=1808 and 4304
respectively. For each primary cube, we also provide three spatially binned
spectral cubes and a set of standardized aperture spectra. For each galaxy, we
include complete 2D maps from parameterized fitting to the emission-line and
absorption-line spectral data. These maps provide information on the gas
ionization and kinematics, stellar kinematics and populations, and more. All
data are available online through Australian Astronomical Optics (AAO) Data
Central.
