The de-Sitter algebra ( SO(d,1) in d dimension) cannot be supersymmetrised as an $\mathcal{N}= 1$ superalgebra due to the fact that it does not satisfy Jacobi's Identity. But in general extended superalgebra are possible (with even $\mathcal{N}$).
My question is how does those algebras look like in D = 3? I am assuming that above statements hold true for D=3.