The year payment is only for the 3 % interest.
10,000 * 0.03 = 300 per year
300/12 = 25 per month
To stop paying interest you must repay the 10,000 principal.
also I recommend always check the current rate, sometimes you are paying 6 or 7 % and there are lower rates available so you could issue a new bond to repay the more expensive one and diminish interest payments and freeing some budget cash