There was no final fling for Pacific Oceania who dropped both reverse singles matches on Sunday to lose their Davis Cup tie with Thailand 5-0 in Guam.
Michael Leong offered some resistance in the opening set before falling 6-4 6-0 to former top 100 player Danai Udomchoke.
Cyril Jacobe was unable to match the power hitting of Kittapong Wachiramanowong, who won 6-2 6-2 to complete the rout.
The home team lost both opening singles rubbers on Friday before going down in the doubles on Saturday.
The 5-0 scoreline matches the same result between the two sides from 2010.