Hi @sowmiya_a
Here are some MCUs that support SD 3.0
-K32L, in reference manual Chapter 62.1.1 (SDHC features) you will find information.
-I.MX RT1060, reference manual Chapter 26.2.2 .
-I.MX RT1170, reference manual Chapter 32.2.2
Do you have another requirement for the mcu? Let me know if you need something else.
Best Regards, Miguel.