No, according to the second law of thermodynamics, the entropy of an isolated system always tends to increase or remain constant. The second law states that the total entropy of an isolated system can never decrease over time for a spontaneous process. In other words, the entropy of a closed system, or the combination of a system and its surroundings, will either increase or stay the same.
Entropy is a measure of the disorder or randomness of a system. It quantifies the number of microstates available to a system given its macroscopic properties. During a spontaneous process, the system tends to evolve towards a state with a higher number of microstates, which corresponds to an increase in entropy.
While it is possible for the entropy of a subsystem within a larger system to decrease during a specific process, the overall entropy of the entire system, including the surroundings, must increase. This means that any decrease in entropy within a system must be compensated by an increase in entropy elsewhere.
It is worth noting that there are cases where the entropy of a system can remain constant, such as in certain reversible processes or at absolute zero temperature (where the entropy reaches its minimum possible value). However, these cases still abide by the principle that the total entropy of an isolated system cannot decrease.