Waiving off 3 months notice period

My current company have notice period of 90 days, can I waive off my notice period down to 60days. My manager is not willing to leave me before completion of 90 days. Below is my Employment contact (offer letter) NOTICE OF TERMINATION During the period of probation or extended period of probation, either party may terminate this contract of service by giving the other one month notice of termination or one month salary in lieu thereof. On confirmation of your service, either party may terminate this contract by giving to the other three months notice of termination or three months salary in lieu thereof. If adequate notice as aforesaid is not given by an employee while resigning from the services of the company, appropriate deduction will be made to cover the notice period from out of the amounts payable to him by the company in the final settlement of accounts. However, the decision on adjusting the notice period will be based on the sole discretion of the Management. Only basic salary will be taken into account for payment of salary in lieu of notice period.