Singapore banned chewing gum in 19 92. It's always been legal to bring small amounts of it, like gum, into the country for your own sake. If you litter with it, if you throw that on the ground, you are being slapped with a heavy fine. As a result the us. Singapore free trade agreement, pharmists and dentists have also been allowed to sell therapeutic gum. Two customers who have a medical prescription, it's medical weed. But gum, i hate that for them.