ALBANY — Rent regulations limiting how much landlords can charge for about one million apartments in New York City and its suburbs expired on Monday night after lawmakers failed to reach an agreement on how to extend them.

With only two days left in this year’s legislative session, the rent laws were one of several big-ticket issues that remained unresolved as last-minute negotiations continued.

Gov. Andrew M. Cuomo and lawmakers have thus far also failed to reach an agreement on a number of issues central to the governor’s agenda, including a tax credit meant to expand access to private schools and a policy that would change sexual consent standards on college campuses.