Hi @Tobias Wehrle Thanks for reaching out. This feature is not available as of today, you can only receive messages by sequence number if those are in a "deferred state". For more information refer https://learn.microsoft.com/en-us/azure/service-bus-messaging/message-deferral
One workaround would be to receive all messages from the queue, then send to the DLQ the ones that would like to delete if you're looking forward deleting a specific message inside the DLQ, then you will need to receive them all, and then defer the one that you would like to delete, then use the receive deferred message method to remove it.
Feel free to leave your feedback on our feedback page https://feedback.azure.com/d365community/forum/79b1327d-d925-ec11-b6e6-000d3a4f06a4
let me know incase of further queries, I would be happy to assist you.
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