  We have studied a flavor symmetry-based extended left-right symmetric
model(LRSM) with a dominant type-II seesaw mechanism and have explored the
associated neutrino phenomenology. The particle content of the model includes
usual quarks, and leptons along with additional sterile fermion per generation
in the fermion sector while the scalar content contains Higgs doublets and
scalar bidoublet. Realization of this extension of LRSM has been done by using
$A_{4}\times Z_{4}$ discrete symmetries. In this work, we have also included
the study of sterile neutrino dark matter(DM) phenomenology along with
neutrinoless double beta decay within the framework.
