  A large fraction of massive stars are found in higher order systems where the
presence of a tertiary may significantly modify the system's evolution. In
particular, it can lead to increased numbers of compact object binaries and
accelerate their mergers with important implications for gravitational wave
observations. Using Gaia, we constrain the number of Galactic supernovae that
produce unbound triples. We do this by searching 8 supernova remnants for stars
with consistent Gaia parallaxes and paths intersecting near the center of the
supernova remnant at a time consistent with the age of the remnant. We find no
candidates for unbound triple systems. Combined with prior work, less than
11.4\% of supernovae leave behind unbound triples at a 90\% confidence limit.
The absence of such systems limits their role in the evolution of massive stars
and the formation of merging compact objects.
