Please Help Me To Correct These Sentences.

anonymousThe parquet tiles were received from wood flooring company in 3 separate shipments.

Some would use "three" instead of "3" by the rule of spelling out single-digit numbers, but this is a fairly technical context. I do not understand this sentence. You seem to be composing a message to the company that supplied the tiles, but you mention "a wood flooring company" as though your addressee would not already know that they were that very company.

anonymousThe first shipment was only clearly labelled and marked room by room.

"Only" is tricky, Even I have trouble deciding where it belongs sometimes, but I would definitely make this "Only the first shipment was clearly labelled and marked room by room." Another way that works is "The first shipment only was clearly labelled and marked room by room."

anonymousThe rest of the 2 shipments were found not be labelled or marked.

"The remaining two shipments were found not be labelled or marked." You could make it "The rest of the shipments were found not be labelled or marked.", but it is better to be explicit about how many.

anonymousNo room details were mentioned.

This seems unnecessary.

anonymousPlease confirm the room details for the the parquet tiles to be installed in the each room.

"Please supply the room details for the the parquet tiles to be installed in each room."

anonymous"The remaining two shipments were found not be labelled or marked." You could make it "The rest of the shipments were found not be labelled or marked.", but it is better to be explicit about how many.

Correction: "shipments were found not to be labelled or marked."

Thank you