Jones was involved in an alcohol-related altercation at a Dallas hotel on Wed., Oct. 8 that resulted in hotel employees calling the police.
NFL commissioner Roger Goodell said Jones' "disturbing pattern of behavior was clearly inconsistent with the conditions I set for your continued participation in the NFL."
Goodell will determine the final length of Jones' suspension following the Cowboys' Week 11 game against Washington on Nov. 16, the league said.
The former West Virginia standout and first-round draft pick was suspended for the entire 2007 season for multiple violations of the league's personal conduct policy while with the Tennessee Titans.
He was traded to the Cowboys during the offseason for a conditional draft pick.
In reinstating Jones on Aug. 28, Goodell said that the player's participation in the NFL depended on demonstrating that he can conduct himself in a socially responsible manner, avoiding any other conduct that brings disrespect to himself, his team, or the NFL.
The decision on whether Jones can return to play this season will be based on his strict compliance with his NFL and Cowboys treatment plans as well as on evaluations of Jones' progress that will be provided to Goodell by clinical experts retained by the NFL.
"We respect and support the decision of the commissioner," Cowboys owner Jerry Jones said in a statement. "I regret that this issue has brought negative attention to the Cowboys and the NFL.
"We move forward with a very clear knowledge as to what the process will be for a possible re-instatement. Adam is well aware of where he stands and what he has to do."
Adam Jones Suspended Again
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