Richardson has lined up top results this season with 10.72 as the best.
She won the U.S. Championships in Eugene, Oregon, last week at 10.86, securing a spot in the Tokyo Olympics where a duel was expected with double Olympic champion Shelly-Ann Fraser-Pryce, who at the age of 34 is better than ever and ran at 10.63 this year.
It is quite clear that Richardson will not start in Stockholm's Diamond League gala on Sunday where it was thought that she would run 200 meters.
"I am human," she wrote in a cryptic post on Twitter late last night.
The fourth in the race should have got an Olympic place
According to Reuters, the four in the race, Jenna Prandini, have been contacted that she will get an Olympic place in the distance.
She already had an Olympic place in the 200 meters where she was second in the American qualifiers.
A positive test of cannabis means that you get washed up in the American championships, which are also qualifiers for the Olympics.
Cannabis is on Wada's banned list.
If an active person can show that the drug has been used without a performance-enhancing purpose, a suspension can be reduced from a normal four years to three months.
If an active member agrees to a treatment program, the sentence can be further reduced to one month.
According to Reuters, such a shorter suspension could make Richardson available to participate in the Olympics from August 6 and be able to be part of the relay team 4x100 meters.
There is also an opportunity to go to the sports arbitration court Cas in Lausanne, but given the short time left until the Olympics, that opportunity feels limited.
Normally, only one judgment takes a couple of weeks to write.
Richardson is one of the guests in tonight's TV show "Today Show on Friday" which is broadcast on NBC.