  In this paper, we study solitons on $3$-dimensional manifolds. In particular,
we show that $3$-dimensional pseudo-symmetric gradient Ricci solitons and
nontrivial gradient Yamabe solitons are locally isometric to either
$\mathbb{R}^{3}$, $\mathbb{S}^{3}$, $\mathbb{H}^{3}$, $\mathbb{R} \times
\mathbb{S}^{2}$ or $\mathbb{R} \times \mathbb{H}^{2}$.
