Which of the following scenarios constitutes a frustration of contract?

Frustration of contract occurs when unforeseen events fundamentally change the nature of the contract or make its fulfillment impossible, beyond what the parties contemplated when they entered into the agreement. In this context, a natural disaster that prevents contract performance is a classic example of frustration of contract. Such events are typically outside the control of the parties and can render performance impossible or impractical, thereby releasing the parties from their obligations under the contract.

The other scenarios do not represent frustration of contract. A party changing their mind about obligations reflects a change in intent rather than an unforeseen event. Similarly, a failure to meet a deadline and a temporary inability to fulfill a condition may involve breaches of contract or other legal considerations, but they do not constitute a total frustration that nullifies the contract's purpose or nature. In essence, frustration involves external, unavoidable events that disrupt the contractual arrangement, which is precisely what happens when a natural disaster intervenes.