United Nations Security Council resolution 561, adopted on 17 April 1985, after recalling previous resolutions on the topic, as well as studying the report by the Secretary-General on the United Nations Interim Force in Lebanon (UNIFIL) approved in 426 (1978), the Council decided to extend the mandate of UNIFIL for a further six months until 19 October 1985.
The Council then reemphasised the mandate of the Force and requested the Secretary-General to report back on the progress made with regard to the implementation of resolutions 425 (1978) and 426 (1978).
The resolution was adopted by 13 votes to none, with two abstentions from the Ukrainian Soviet Socialist Republic and Soviet Union.