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I will present some recent developments in supersymmetric gauge theories in three dimensions. I will discuss two classes of supersymmetric observable, invariant under certain supercharges available only with $\mathcal{N}\ge4$ supersymmetry. The first is a set of local operators whose correlators on a line do not depend on the position. They provide a tractable non-trivial subsector containing information on the whole theory. In particular, I will illustrate a Ward identity that relates the topological sector to some integrated correlators associated with real mass deformations. The second is the so-called latitude Wilson loop. I will propose a localization formula and exploit the result to argue a novel duality among loop operators.