Guide

1. Click 'Create' and select 'Zap' to start automation.

2. Click 'Trigger'.

3. Search and select 'Slack' as the trigger app.

4. Choose a trigger event based on your requirements.

5. Log in and authorize Zapier to access your Slack account.

6. Click 'Test trigger' and Zapier will pull sample data from Slack to ensure everything is set up correctly.

7. Search and select 'Basecamp 3' as the action app.

8. Choose an action event.

9. Log in and authorize Zapier to access your Basecamp 3 account.

10. Select your Account and Project for your action app and click 'Continue'.

11. Click 'Test step' to run the test.

12. Select 'Rename' to provide your Zap a name.

13. Once everything is set up correctly, turn on your Zap to enable the integration by clicking 'Publish'.