  When materials are patterned in three dimensions, there exist opportunities
to tailor and create functionalities associated with an increase in complexity,
the breaking of symmetries, and the introduction of curvature and non-trivial
topologies. For superconducting nanostructures, the extension to the third
dimension may trigger the emergence of new physical phenomena, as well as
advances in technologies. Here, we harness three-dimensional (3D)
nanopatterning to fabricate and control the emergent properties of a 3D
superconducting nanostructure. Not only are we able to demonstrate the
existence and motion of superconducting vortices in 3D but, with simulations,
we show that the confinement leads to a well-defined bending of the vortices
within the volume of the structure. Moreover, we experimentally observe a
strong geometrical anisotropy of the critical field, through which we achieve
the reconfigurable coexistence of superconducting and normal states in our 3D
superconducting architecture, and the local definition of weak links. In this
way, we uncover an intermediate regime of nanosuperconductivity, where the
vortex state is truly three-dimensional and can be designed and manipulated by
geometrical confinement. This insight into the influence of 3D geometries on
superconducting properties offers a route to local reconfigurable control for
future computing devices, sensors, and quantum technologies.
