We present an $N=1$ supersymmetric multiplet with a vector-spinor field in three dimensions. We call this the vector-spinor multiplet with the field content $({\psi }_{\mu },A_{\mu },\lambda )$, where ${\psi }_{\mu }$ is a vector spinor, $A_{\mu }$ is a vector, while $\lambda$ is a gaugino. Based on on-shell component field formulation, we can accommodate $N=1$ supersymmetric Dirac-Born-Infeld (SDBI) interactions consistently with supersymmetry. This is possible even in the presence of the vector spinor. The ${\psi }_{\mu }$-field equation contains a nontrivial interaction term with $A_{\mu }$. Moreover, it turns out that in the presence of mass terms, one physical degree of freedom in the original $\lambda$ is transferred to that of ${\psi }_{\mu }$, making the latter propagating. In other words, our model presents nontrivial rewriting of SDBI interaction in terms of $({\psi }_{\mu },A_{\mu })$ instead of $(A_{\mu },\lambda )$.

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