  Nonlocal gravity (NLG) is a classical nonlocal generalization of Einstein's
theory of gravitation that has been constructed in close analogy with the
nonlocal electrodynamics of media. According to NLG, what appears as dark
matter in astrophysics and cosmology is in reality the nonlocal aspect of the
universal gravitational interaction. We focus here on two main features of the
effective dark matter in NLG, namely, (a) the density of effective dark matter
in NLG is always finite and therefore cusp-free, and (b) there is less
effective dark matter in dwarf galaxies than is generally assumed in the
standard particle dark matter paradigm. The corresponding astrophysical
implications of NLG in connection with three ultra-diffuse galaxies AGC 114905,
242019, and 219533 are discussed.
