The phrase "agreement subsequently" is correct and usable in written English.
It can be used to refer to an agreement that follows or comes after a certain event or action.
Example: "The parties reached an agreement subsequently, after extensive negotiations."
Alternatives: "agreement thereafter" or "agreement following".
Under the Trump administration, China has at least twice reached agreements with designated U.S. negotiators, only to have those agreements subsequently rejected by the U.S. side.
(That agreement was subsequently undone when a second potential buyer, Cablevision, made a better offer than the Jets, and the Port Authority resumed negotiations with both parties).
During his tenure at the Mauritius Embassy in Belgium, he was intensively involved in the ACP-EU negotiations leading to the Cotonou Agreement and subsequently in the Economic Partnership Agreement EPAA) negotiations.
The agreement was subsequently denied by the president, but in 2010 the secretary general set up his own independent Panel of Experts on Accountability in Sri Lanka.
Because of her pivotal role in the peace agreement, Inez subsequently campaigned for implementation of these rights as key to an understanding of conflict resolution based on the practice of justice.
He threatened to quit the Paris climate agreement, then subsequently backtracked, but has made no secret of his desire to open up the Amazon to mining, farming and dam building.
Salesforce says the joint venture agreement has subsequently been terminated with the acquisition.
In Kyoto, nations attempted to create a legally binding agreement, which subsequently failed to deliver results in part because the United States would not ratify the treaty.
The Armistice Agreement was subsequently signed at 10 00 on 27 July.
An agreement was subsequently reached between the RCAF and RAAF and the squadron kept the designation.
