Deleting a conversation in the LinkedIn Android app:
When you delete a conversation thread in LinkedIn you would not be able to recover the messages and it is also not possible to delete a single message in a conversation thread. Read on to know how to delete in an Android app:
Open the LinkedIn app on your Android device.
Find Messaging tab in the navigation bar and tap on it.
Choose the message to be deleted from the message list.
Then in the conversation thread, find the participant's photo icon located on the top right corner and tap on it.
Now, tap on Delete conversation.
When asked to confirm the deletion, tap on Delete in the pop-up window.