Is it possible to run two asynchronous methods in parallel and then wait for a third method before continuing with subsequent operations?

Yes, in iOS it is possible to implement parallel execution of two asynchronous methods with subsequent waiting for a third, and then continue execution.

One convenient way is to use DispatchGroup from GCD (Grand Central Dispatch). Example in Swift:

let group = DispatchGroup()

// Run the first two asynchronous methods in parallel
group.enter()
asyncMethod1 {
    // Complete task 1
    group.leave()
}

group.enter()
asyncMethod2 {
    // Complete task 2
    group.leave()
}

// When both tasks are finished, run the third method
group.notify(queue: .main) {
    asyncMethod3 {
        // Continue execution after the third method
        print("All operations completed")
    }
}

Thus, DispatchGroup allows tracking the completion of multiple asynchronous operations and executing the next step only after their completion.