Not as far as I can tell. As part of its obligations under the NetzDG law, Twitter is required to publish a biannual report regarding the handling of complaints submitted pursuant to this law, which can be found here. In the latest, Report July - December, 2019, the decision criteria for removal is described:
Jede erhaltene NetzDG-Beschwerde wird zuerst anhand der Twitter Allgemeinen Geschäftsbedingungen
(“AGB”) und Twitter Regeln überprüft. Stellen wir fest, dass Inhalte die Twitter Allgemeinen
Geschäftsbedingungen und/oder die Twitter Regeln verletzen, werden diese gänzlich von der Plattform
entfernt. Die verbleibenden Inhalte werden dann hinsichtlich des NetzDG überprüft. Wenn festgestellt wird,
dass Inhalte gegen NetzDG verstoßen, werden diese basierend auf lokalem Recht in Deutschland zurückgezogen.
Each NetzDG complaint received is first checked under the Twitter
Terms of Service and Twitter rules. If we find that the content
contravenes either of these, we remove the content completely from the
platform. The remaining contents are then checked under the NetzDG
terms. If it is determined that the content violates NetzDG, it is
withdrawn based on local law in Germany.
I can't find any instance of Twitter removing Trump's tweets from the platform as a whole for hate speech, only for copyright infringement, so let's assume that if a tweet had been removed under the NetzDG law, it must be only blocked in Germany.
The remainder of this paragraph describes how all takedown requests are published by Twitter to the Lumen database, which collects legal complaints and requests from removal. A search there yields all NetzDG requests, each with a list of infringing URLs, none of which seem to come from @realDonaldTrump (User ID: 25073877).
In addition, if a tweet had been blocked in Germany in particular, it is not expunged completely (source); users browsing from that country see a message as below:
We can conclude, therefore, based on the fact that President Trump is a particularly prominent public figure, and the reporting of previous instances of his tweets being removed (see above) that there would have been at least some reporting of this having occurred; however I can find no such reports. This combined with the above database leads me to be fairly confident that the NetzDG laws have not been used to censor any of President Trump's tweets.