Deadline reports that CBS is canceling its new Monday night sitcom Partners. The low-rated series, starring David Krumholtz, Michael Urie, Sophia Bush, and Brandon Routh, follows a pair architecture partners/best friends - one gay, one straight - and their significant others. In addition to not faring well in the Nielsen ratings, Partners, CBS’s only new fall comedy, also scored low with critics. Deadline suspects that Partners’ timeslot will be filled with CBS’s old standby Rules of Engagement before the new comedy Friend Me makes its debut in the slot at midseason. Partners is the third sitcom cancellation of the season after NBC pulled both Animal Practice and the unaired Dane Cook vehicle Next Caller. Even though Partners’s ratings were low for CBS’s standards (the last episode hit a series low at 1.8 in the 18-49 and 5.48 mil viewers overall), I’m sure the execs at NBC would kill for any of their Thursday comedies to perform that well.