Will I suffocate if I breathe less following Buteyko instructions?

No. For most students who are new to the Buteyko Breathing Method, the concept of breath reduction may seem counterintuitive. Many have spent their lives fighting to breathe enough air. However, breathing less triggers relaxation and dilation of the smooth muscles along the bronchial tubes, which gives an asthmatic or any person with breathing difficulties relief from their symptoms.

To understand it is beneficial for asthmatics to breathe less, visit this page.