Thai parliament has not ruled on the meeting in part due to extreme political instability in Thailand.
Cambodia is preparing for local commune elections in 2012 and national parliamentary elections in 2013.
After the asylum seekers, were put on a plane and sent to China, Chinese leaders pledged $1.2 billion in aid to Cambodia.
The three men were arrested in Oddar Meanchey province and accused of illegal entry and possession of weapons.
Hor Namhong also requested that Thai border authorities exercise restraint in dealing with Cambodians who illegally cross borders.
The package included $300 million in projects for national road and irrigation projects in three provinces.
The Cambodian Foreign Affairs Ministry had ordered a Jan. 1, 2011, close date for the site.
They were sentenced to 18 months in prison and a $250 fine in Siem Reap provincial court last week.
Such exercises have become more common between the two countries, with a gradually thawing of ties following Sept. 11, 2001.
The conflict resolution centers are geared to help the poor, women and minorities.