1. If i do not want to pay the rent for Sepetember , October and November (notice period months) due to my financial obligation can i be adamant on asking to deduct the same from my SD without violating any legal obligation.
The advance or security deposit amount with him is again your money, since you have made your intention clear to vacate he rented premise, there is nothing wrong in not paying the rent for the notice period of two months since he is already in possession of your amount for which there is no interest also paid.
There is no question of dilation of any law or condition. .
The owner canot claim any loss over this.
2. If my previous point is valid then will i have the full rights to get back my final SD amount (after deductions) or will my landlord chosse not to give the final SD.
Your landlord cannot deny to refund the SD amount after deductions.
You can drag him to rent control court for this.