At least 20 civilians, identified as internally displaced persons, including women and children, were killed and an undisclosed number of others were wounded in the airstrikes, which fueled new worldwide condemnation for Saudi targeting policies.
The UN said that the victims of the bombing, which hit Al Atera village in Taiz province where fighting between Yemen's two warring sides has intensified, were internally displaced people (or IDPs).
The coalition has since March 2015 been targeting Houthi rebels fighting pro-government forces in Yemen in the country's deadly civil war and global rights groups accuse it of bombing civilian gatherings, markets, hospitals and residential areas across the country.
Shabia Mantoo, United Nations High Commissioner for Refugees (UNHCR) spokesman in Yemen, said most of those killed were believed to be from the same family.
Yemen has been locked in a power struggle between President Abd Rabu Mansour Hadi and Iran-allied Houthi rebels since 2014.
The Saudi-led coalition has faced repeated criticism over civilian casualties in Yemen.
The impoverished Arab country has been devastated by the war, which has killed more than 10,000 people and sparked a cholera outbreak among 300,000 people.
The coalition launched a military operation against the rebels in March 2015 as insurgents closed in on Hadi in his southern refuge in Aden forcing him to flee to Riyadh. However, they "continue to be exposed to danger as the conflict has affected all of Yemen's mainland governorates", UNHCR said in its statement Tuesday.
Another suspected coalition raid in Taez province in May was reported to have killed more than 20 civilians.
The UNHCR statement said appealed for parties to the conflict to do "their utmost in the protection of civilians and the mitigation of suffering".
Repeated attempts to bring about a political solution to the conflict, including a series of UN-mediated peace talks, have failed.
The figures confirm that the U.S. support for the campaign has continued to increase despite increasing condemnation as a result of the civilian casualties and war crimes allegations.