  We consider baryon-number-violating nucleon and dinucleon decays to leptonic
final states in the context of a left-right symmetric (LRS) model with large
extra dimensions. Specifically, we study (a) nucleon to trilepton decays with
$\Delta B=-1$ and $\Delta L=-3$, and (b) dinucleon to dilepton decays with
$\Delta B=-2$ and $\Delta L=-2$. In the LRS model, $B-L$ is gauged and is
spontaneously broken by a Higgs vacuum expectation value $v_R$, which
characterizes the scale at which processes violating $B-L$ occur. We show that
together with the lower bound on $v_R$ from experimental limits on $n$-$\bar n$
oscillations, constraints from searches for other nucleon decay modes imply
sufficient suppression of these nucleon to trilepton and dinucleon to dilepton
decay modes in this model to agree with experimental bounds.
