Many foreign countries sell disposable diapers. In fact, they sometimes sell the same name brands you find at home. However, the quality of foreign-made brands can vary considerably from country to country.
Prices can differ, too.
If you're heading to the Caribbean, for example, you're likely to find the brands you depend on at home at a much higher price. If you're on a tight budget, it's a good idea to pack a supply of diapers to last throughout your trip. Many developing countries have disposable diapers for sale in larger cities but not in small towns and rural areas. Keep in mind that most foreign countries use the metric system and measure a person's weight by kilos rather than pounds. As with any source of medical or health care information, you should as a preliminary matter satisfy yourself that the credentials and experience of the source are suitable.