MAPFRE will have to stay out of the race for at least 12 hours and return to the same place before they can resume racing.
Given the speed of the other boats, the delay could knock the overall race leader back significantly.
However, the forecast could work in MAPFRE's favour as a ridge of high pressure is expected to slow the frontrunners and allow the trailing boats to catch up.
"A complete restart just after the Falklands," is how Team Brunel skipper and leg leader Bouwe Bekking described it.
Meanwhile, each of the other teams have now rounded Cape Horn - paying tribute to Scallywag's John Fisher, who was lost overboard on Monday.
Bekking said it was an important stage to get past.
"Well, we are finally around that Cape Horn. It didn't come easy this leg, as everybody knows, it was a windy one," he said.
"It's like a mental milestone, you're coming from the Southern Ocean and every mile you sail north the weather gets warmer and the finish of the race at The Hague is literally a step closer. It's a magical picture and a highlight for every sailor.
"But even if we had a little celebration when we went past, we also had a toast to John Fisher, who we keep thinking about."
Time of crossing the longitude of Cape Horn (provisional):
Team Brunel: 13:01 UTC (Team Brunel earns one point)
Vestas 11th Hour Racing: 15:01 UTC
Dongfeng Race Team: 15:45 UTC
team AkzoNobel: 17:22 UTC
Turn the Tide on Plastic: 17:35 UTC
MAPFRE: (suspended racing west of Cape Horn)
Sun Hung Kai/Scallywag: (suspended racing)
