It is not possible to restore a snapshot back to RDS from an S3 bucket. The "Export to Amazon S3" feature, does not copy the snapshot itself. When you export a DB snapshot, Amazon RDS extracts data from the snapshot and stores it in an Amazon S3 bucket in your account. The data is stored in an Apache Parquet format that is compressed and consistent.
After the data is exported, you can analyze the exported data directly through tools like Amazon Athena or Amazon Redshift Spectrum . The feature of export to S3 is to analyze the exported data directly through tools like Amazon Athena or Amazon Redshift Spectrum, and it cannot be used with "Restore from S3" option.
You can't restore from an encrypted backup in the Amazon S3 bucket..
 Exporting DB snapshot data to Amazon S3 - https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ExportSnapshot.html
 Restoring a backup into a MySQL DB instance - https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/MySQL.Procedural.Importing.html
encrypted db snapshot restore from S3 not working AWS RDS(mysql) console in an S3 bucket.asked 6 months ago
Restore encrypted Snapshotasked 4 months ago
Cannot restore RDS snapshotasked 6 months ago
CDK: How to create an encrypted Aurora MySQL-compatible cluster using an un-encrypted snapshotEXPERTasked 7 months ago
How to determine if an object is encrypted with a "regular" S3-SSE KMS key, or an S3 Bucket Key with S3 Inventory?Accepted Answerasked 2 years ago
SES – email receiving + S3 action + encrypted S3 bucket = FAILasked 4 months ago
S3 upload issues through the AWS consoleasked 7 months ago
Add encryption to a multi-az cluster db snapshot?asked 3 months ago
Can I Import .sql files from Encrypted s3 bucket into Encrypted MySQL RDS instance?asked 2 months ago
Can I import an RDS uncrypted mysql snapshot to an RDS encrypted mysql?Accepted Answerasked 6 months ago