Unfortunately, within the Maltese population, diabetes is a medical condition that affects close to 7% of the population.
However, one is still able to dive even though s/he might suffer from this condition, subject to a few precautions. The Divers Alert Network, a well-respected international institution which has been studying and sharing medical information for Divers, shared the following Facebook post, outlining these precautions, and what to do in various cases.
An interesting read, not just for the diabetes sufferers but also their buddies and instructors!