Yes, there are a few options to pause your Shopify storefront, provided you are eligible (i.e. you are least 60 days past your free trial period, and are not on Shopify Plus):
Pause and build – this lets you ‘freeze’ and continue to work on your store for a reduced subscription fee. Customers can still view your products, but can’t make purchases.
Pause – this allows you to ‘close’ your store for three months and pay no subscription fee. You won’t be able to sell or make changes to your store during this time.