Yes, cucumbers are low FODMAP as long as these are served under a controlled serving size. As per the FODMAP-friendly app, cucumber is safe to be included in the FODMAP diet if its serving size is not exceeding 1/2 cup, approximately 64 g per serving. It also states that cucumbers are high in fructose in a 3/4 cup serving size, i.e. 100g. So avoid consuming it in a high amount. FODMAP Present- Fructose