You can claim good cause for situations beyond your control if you miss hours of work or Employment and Training but you still keep your job or training placement. This includes if you get sick or need to take care of a household member who is sick, if your transportation temporarily breaks down, or if there’s a death in the family or other unexpected household emergency. 106 C.M.R. §362.320(C).
If you can verify a good cause reason that you missed hours of work or training, DTA should not count that month against your 3 months of SNAP benefits. See What is considered a “good cause” reason if I quit my job?