Whenever it appears to the Small Cause Court that any judgment-debtor under its decree is unable, from sickness, poverty or other sufficient cause, to pay the amount of the decree, or, if such Court has ordered the same to be paid in instalments, the amount of any instalment thereof, it may, from time to time, for such time and upon such terms as it thinks fit, suspend the execution of such decree and discharge the debtor, or make such order as it thinks fit.