Romania coach Victor Piturca says Cesena striker Mutu and West Bromwich Albion defender Tamas defied orders by going out and drinking on Monday.
Romania beat San Marino 1-0 on Wednesday.
It is the latest in a long line of troubled episodes for Mutu. In October, while at Fiorentina, he attacked a barman little more than a week before his return from a nine-month doping ban.
In 2004, the 32-year-old was sacked by Chelsea and banned for seven months having tested positive for cocaine. He was ordered to pay Chelsea ?17 million (US$24 million) in compensation.