This assumes you have already:

• Downloaded and Installed the AWS Serverless Application Model (SAM) CLI on Linux.
• Initialize Serverless Application Model (SAM) app using the sam init command
• Built your Serverless Application Model (SAM) app using the sam build command
• Deployed Serverless Application Model (SAM) app using the sam deploy command

Let's say the template.yaml file for your SAM app is located at /tmp/sam-app/template.yaml.

]$ ll /tmp/sam-app
total 20
drwxrwxr-x 2 ec2-user ec2-user   24 Nov 16 02:13 events
drwxrwxr-x 2 ec2-user ec2-user   63 Nov 16 02:13 hello_world
-rw-rw-r-- 1 ec2-user ec2-user    0 Nov 16 02:13 __init__.py
-rw-rw-r-- 1 ec2-user ec2-user 8329 Nov 16 02:13 README.md
-rw-rw-r-- 1 ec2-user ec2-user  679 Nov 16 02:13 samconfig.toml
-rw-rw-r-- 1 ec2-user ec2-user 1681 Nov 16 02:13 template.yaml
drwxrwxr-x 4 ec2-user ec2-user   80 Nov 16 02:13 tests

The sam delete command can be used to delete the sam app.

~]$ cd /tmp/sam-app
~]$ sam delete
        Are you sure you want to delete the stack sam-app in the region us-east-1 ? [y/N]: y
        Do you want to delete the template file 2c2442f3170c7728f9899ef18d9d7ac0.template in S3? [y/N]: y
        - Deleting S3 object with key f01066ce6035a17ea2adef79e42373b9
        - Deleting S3 object with key 37503c517aa90258ae76a6958d006922.template
        - Deleting S3 object with key 2c2442f3170c7728f9899ef18d9d7ac0.template
        - Deleting Cloudformation stack sam-app

Deleted successfully