"We are proud of you," said President Bashar al-Assad, who flashed smiles and stopped for chats with soldiers in eastern Ghouta.
The only previous U.N. delivery of assistance to eastern Ghouta so far this year was on Feb. 14.
Some 190 people have died in the rebel enclave since Sunday night, according to war monitor Syrian Observatory for Human Rights.
Syrian civil defense workers, known as the White Helmets, pulled children from the wreckage of buildings hit by government forces in a rebel-held area of the Syrian capital.
Doctors with the Syrian American Medical Society report a sharp rise in the number of hospital attacks since the start of the year.
Airstrikes by Russian jets on Idlib province struck a hospital. Dramatic video shows rescue workers evacuating newborn babies to safety.
Civil defense sources said air raids struck the towns of Kafr Nubl and Maasran, as well as the cities of Saraqeb, Maarat al Numan and Idlib.