That gave the gold medal to Shannon Rowbury. She finished in 9 minutes, 25.49 seconds Saturday.
"A review of the official's report by the women's running head referee and subsequently by the jury of appeal led to a ruling of no infraction," USA Track & Field said in a statement Sunday. "The jury of appeal then reviewed additional video evidence and reversed their initial ruling, disqualifying Grunewald for a field-of-play infraction impeding Jordan Hasay."
Grunewald said the contact with Hasey, who originally finished fourth, was inadvertent.
"Jordan and I were both making a move," Grunewald said. "I was planning on following her then she slowed down. So I tried to go around her and there was some contact. It wasn't purposeful on my part it just gets really tight on the turn. I was going really fast."
Grunewald finished in 9:23.15.