They went on with the women's snowboard slopestyle on Sunday and faced criticism when the riders called the conditions risky because of the high winds.
Instead, she will begin on Wednesday - weather permitting, of course - in the slalom, a race she has dominated for five years, and then ski again the next day.
Material from the Associated Press was used in this report. "They said we had to do it today".
Earlier this week in the women's slopestyle event, several riders were critical that racing was held in adverse conditions, with one Dutch snowboarder insisting the competition was a lottery.
Of the 50 athletes in the field, only nine laid down a completed run, leading to concerns about the safety of the competitors.
"Got picked up in the wind on the bottom jump in practice and my ACL was not a big fan!" she posted on Instagram.
"I am pretty sure that soon, we will have a race", men's race director Markus Waldner said Monday.
"It is a very heavy load", said Shiffrin's coach, Mike Day.
Wendy Holdener became the first Swiss woman in 20 years to finish on the podium in slalom at the World Championships with a second place in 2017.
"It is unfortunate that we weren't able to race today, but it is important we have a fair race for all of the athletes", said Shiffrin, who could realistically target at least four medals in Pyeongchang. "We all know with big wind gusts it's not possible to put on speed races".
Although it is one of Alpine skiing's technical rather than speed events, the top skiers can still get up to 40 kph (25 mph) on the giant slalom course and crashes can be dramatic.
On Friday, the rearranged slalom is due to be staged as the men compete in the super-G.
Wednesday's postponement was the third alpine schedule change of the Pyeongchang Games.
The Alpine skiing at the 1998 Games in Nagano was heavily disrupted by heavy snow and rain and the men's downhill was rescheduled three times.
Mark Adams, a spokesman for the International Olympic Committee, said organizers were not concerned about the schedule.