They were paused yesterday because of security concerns amid attacks by Islamic State militants.
UN deputy spokesman Farhan Haq said today that after a new security assessment, officials decided the suspension could end. He noted that other organizations have been continuing humanitarian work in eastern Mosul.
Mosul is Iraq's second-largest city. IS captured it in summer 2014.
Iraq declared Mosul's eastern half "fully liberated" last month. A semblance of normal life returned to many areas, but some neighborhoods have still been hit by insurgent attacks.