Play was halted, the referee bounced the ball on the pitch to see if it would roll and then led the players off.
Shortly afterwards, Serie A announced that the game had been postponed, but did not give a new date for the fixture.
Roma are second in the table with 50 points, six behind leaders Juventus who host Inter Milan on Sunday evening (1945 GMT).
(Writing by Brian Homewood in Berne; Editing by Rex Gowar)
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