  Observations of the highly isolated dwarf spheroidal galaxy KKs 3 = [KK2000]
03 with the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) are
presented. We measured the galaxy distance of $2.12\pm0.07$ Mpc using the Tip
of Red Giant Branch (TRGB) method. The total blue absolute magnitude of the
galaxy is estimated as $M_B = -10.8$ mag. We briefly discuss the star formation
history of KKs 3 derived from its colour-magnitude diagram. According to our
calculation, the total stellar mass of the galaxy is $2.3\times10^7M_{\odot}$,
and most stars (74\%) were formed at an early epoch more than 12 Gyr ago. A
full description of the properties of the colour-magnitude diagram requires
some extension of star formation in metallicity and age.
