  Let $E$ be a finite Galois extension of a $p$-adic field $F$ with degree of
extension $l$, where $l$ and $p$ are distinct odd primes with $l\ne 3$. Let
$\pi_F$ be an integral cuspidal $\overline{\mathbb{Q}}_l$-representation of
${\rm GL}_3(F)$ and let $\pi_E$ be the base change lifting of $\pi_F$ to the
group ${\rm GL}_3(E)$. Then for any ${\rm GL}_n(E)\rtimes{\rm Gal}(E/F)$-stable
lattice $\mathcal{L}$ in the representation space of $\pi_E$, the Tate
cohomology group $\widehat{H}^0({\rm Gal}(E/F),\mathcal{L})$ is defined as
$\overline{\mathbb{F}}_l$-representation of ${\rm GL}_3(F)$, and its
semisimplification is denoted by $\widehat{H}^0(\pi_E)$. In this article, we
show that the Frobenius twist of mod-$l$ reduction of $\pi_F$ is isomorphic to
the Tate cohomology group $\widehat{H}^0({\rm Gal}(E/F),\mathcal{L})$.
