The Bahrain Victorious rider entered the flatland sixth in the general classification and was eager to build on the form that’s produced two top-10 finishes in succession.
One last left-hand curve, however, brought an end to those hopes, as a massive crash forced the 27-year-old to abandon the race from Lorient.
Haig was taken to Hospital Centre Bretagne in the aftermath of the incident, where it was later revealed he had suffered a fractured collarbone and concussion.
“Jack suffered a fractured left collarbone and concussion following the crash,” team doctor Piotr Kosielski said.
“He is conscious and okay, and scans showed no head trauma.
“He will remain in hospital overnight for observation following the team and UCI protocols.”
Geraint Thomas, Primoz Roglic and Peter Sagan were among those involved in the incidents, as Tim Merlier capitalised on a brilliant Alpecin-Fenix lead-out to take his first-ever stage win.
The Tour de France continues tonight with Stage 4 from Redon to Fougeres and you can catch all the action LIVE on SBS and SBS On Demand from 9:30pm (AEST), with SKODA Tour Tracker App starting from 9:15pm (AEST).