"By failing to set up a serious UN inquiry on war-torn Yemen, the Human Rights Council squandered an important chance to deter further abuses," Human Rights Watch Deputy Director in Geneva Philippe Dam stated.
The UNHRC, Dam added, "failed to generate effective international scrutiny over attacks by all the warring parties that have caused thousands of civilian deaths in Yemen in just a few months."
The watchdog also said that "key countries," including the United States and the United Kingdom, failed to back the draft resolution, while Yemen "boycotted negotiations" on the proposed resolution by The Netherlands.
In March, Saudi Arabia began carrying out airstrikes against opposition Houthi rebels in Yemen at the request of ousted Yemeni President Abd Rabbuh Mansur Hadi.
Recent estimates from the UN Office for the Coordination of Humanitarian Affairs show that some 1.5 million people are currently internally displaced in Yemen as a result of the fighting. More than 21 million Yemenis are reported to be in need of humanitarian protection or assistance.