That is a major pain in the ass... not having the US embassy available to notarize documents.
I ran into this problem myself while trying to do a US
property transaction while living in Singapore.
Because of quirks in the international notary law, foreign notaries are not acceptable... the "minister of oaths", I believe it is called in Singapore. I had to use the US embassy.
Take a look at this website... second bullet:
https://travel.state.gov/content/travel ... sular.html
Perhaps you can find a way to get notarized this way.
With respect to PNGMK's idea... any US lawyer in Singapore would still have to have a commission in the USA for the notarization to be valid.
And then there is this:
https://usvirtualnotary.com/service/int ... wEEALw_wcB
No idea how it works... but you much check with the title company to see if it will fly.
Good luck.