No. The government thinks it’s so important to give people the chance to save for retirement that your employer is legally obliged to re-enrol you if you qualify. If your employer doesn’t keep to the rules they can face big fines from The Pensions Regulator.
However, if you are re-enrolled you can opt out again if you want to. Your employer will refund any contributions you made while you were re-enrolled, as long as you opt out within one month of being re-enrolled.