I just found this from the HDB website.
Q: 01 Are foreigners allowed to purchase HDB shops?
[ Commercial Tenants & Lessees > Managing Your Sold Shop ]
A: HDB has no objection to the purchase of the shops by foreigners who are above 21 years of age and are not an undischarged bankrupt.
Foreigners who want to speculate on Singapore properties can go and buy HDB shops. No need to buy residential flats.
Dunno got find prints and any other conditions? Or this is it?