Lawmakers in Islamabad instead approved a draft resolution calling on the government to play a mediating role in the conflict against the Houthi rebels.
The Saudis are trying to rehabilitate convicted terrorists with programs such as art therapy in a resort setting. More than 80 percent have reformed, the Saudis say. But some returned to al-Qaida.
Houthi fighters capture a central district of Aden, Yemen's economic hub, as al-Qaida militants free inmates from a prison. The ongoing violence is turning many Yemenis against the Saudi air campaign.
Airstrikes intensified as Houthi rebels advanced on the port city of Aden. Aid agencies say one airstrike killed dozens at a refugee camp, while Yemeni officials blamed rebel shelling.
Airstrikes and anti-aircraft fire rocked the capital, Sanaa, while Houthi rebels continued their push into southern Yemen. Meanwhile, Arab foreign ministers gathered in Egypt.
Yemen is minor producer of crude oil but controls a strategic energy waterway. More than 3.8 million barrels a day pass through the Bab el-Mandeb Strait at the southern entrance to the Red Sea.