Right now the best way to do this is to revert your account to patron-only. If you have existing patrons, I would first send them a message or make a post noting your decision to stop using the Patreon platform. Then, revert your account to patron-only:
Step 1 - Pay out any remaining balances from your account by heading to your Payout Settings: https://www.patreon.com/settings/payout
You might also wish to download your payout history from your Dashboard for tax purposes: https://www.patreon.com/dashboard/payouts
Step 2 - Head to your account settings page: https://www.patreon.com/settings/profile
Step 3 - Click the "revert account to patron-only" link next to edit page details
Step 4 - You'll be given the option to pause your account for one month or fully revert. Click Revert and save changes at the bottom of the page.
Your account has now been reverted to patron-only and you won't be able to receive new pledge payments. You can still use Patreon as a patron or leave your profile idle until you are ready to return.