"The club will make no further comment at this time."
Local media reported that the decision to suspend Pearson was taken pending a club investigation into his behaviour. Derby said that assistant manager Chris Powell would take charge of the team for the Cardiff clash.
Former Leicester boss Pearson signed a three-year deal with Derby in May, taking over from Darren Wassall. He has endured a difficult start to the season, however, winning just one of their nine league games.
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Pearson was sacked by Leicester at the end of the 2014-2015 season because of a breakdown in his relationship with the club's owners, after he guided the Foxes to top-flight safety when they had appeared destined for relegation.
During his last season with Leicester, Pearson had an on-field altercation with Crystal Palace's James McArthur, and courted controversy when he referred to a reporter as an "ostrich". He later apologised for the comments.
(Reporting by Nivedita Shankar in Bengaluru; Editing by Toby Davis)
