Asia awaits Obama first appearance at APEC meeting. (Photo / Reuters)

Asia awaits Obama first appearance at APEC meeting. (Photo / Reuters)

US President Barack Obama will make a surprise early appearance at the APEC meetings in Singapore on Saturday, after bringing forward his departure from Japan, a US official said.

The official told AFP on condition of anonymity that Obama would be able to make some Asia Pacific Economic Cooperation (APEC) forum functions after all on Saturday, following an adjustment to his schedule.

It was not immediately clear which APEC events Obama would attend, ahead of a full day of summit talks on Sunday.

Obama had been due to arrive in Singapore on Friday night for his debut at the Asia-Pacific leaders summit, but cut short his regional tour by a day to attend a memorial service to those killed in the Fort Hood massacre last week.