# sleep(for:tolerance:clock:) Suspends the current task for the given duration. ``` static func sleep(for duration: C.Instant.Duration, tolerance: C.Instant.Duration? = nil, clock: C = .continuous) async throws where C : Clock ``` ## Discussion If the task is canceled before the time ends, this function throws `CancellationError`. This function doesn’t block the underlying thread. ``` try await Task.sleep(for: .seconds(3)) ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)