ETRS 1989 DKTM3 - ESRI:103218

WKT

PROJCS["ETRS_1989_DKTM3", 
	GEOGCS["GCS_ETRS_1989", 
		DATUM["D_ETRS_1989", 
			SPHEROID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Transverse_Mercator"], 
	PARAMETER["False_Easting", 600000.0], 
	PARAMETER["False_Northing", -5000000.0], 
	PARAMETER["Central_Meridian", 11.75], 
	PARAMETER["Scale_Factor", 0.99998], 
	PARAMETER["Latitude_Of_Origin", 0.0], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["ETRS_1989_DKTM3", 
	BASEGEOGCRS["GCS_ETRS_1989", 
		DATUM["D_ETRS_1989", 
			ELLIPSOID["GRS_1980", 6378137.0, 298.257222101]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Transverse_Mercator", 
		METHOD["Transverse_Mercator"], 
		PARAMETER["False_Easting", 600000.0], 
		PARAMETER["False_Northing", -5000000.0], 
		PARAMETER["Central_Meridian", 11.75], 
		PARAMETER["Scale_Factor", 0.99998], 
		PARAMETER["Latitude_Of_Origin", 0.0]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["Esri", "4095"]]

Data from @esri/proj-codes

{
  "wkid": 103218,
  "latestWkid": 4095,
  "gcsWkid": 4258,
  "macro": "PE_PCS_ETRS_1989_DKTM3",
  "name": "ETRS_1989_DKTM3",
  "wkt": "PROJCS[\"ETRS_1989_DKTM3\",GEOGCS[\"GCS_ETRS_1989\",DATUM[\"D_ETRS_1989\",SPHEROID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",600000.0],PARAMETER[\"False_Northing\",-5000000.0],PARAMETER[\"Central_Meridian\",11.75],PARAMETER[\"Scale_Factor\",0.99998],PARAMETER[\"Latitude_Of_Origin\",0.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"ETRS_1989_DKTM3\",BASEGEOGCRS[\"GCS_ETRS_1989\",DATUM[\"D_ETRS_1989\",ELLIPSOID[\"GRS_1980\",6378137.0,298.257222101]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Transverse_Mercator\",METHOD[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",600000.0],PARAMETER[\"False_Northing\",-5000000.0],PARAMETER[\"Central_Meridian\",11.75],PARAMETER[\"Scale_Factor\",0.99998],PARAMETER[\"Latitude_Of_Origin\",0.0]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"Esri\",\"4095\"]]",
  "description": "ETRS 1989 DKTM3",
  "authority": "Esri",
  "version": "9.3.1.2",
  "deprecated": "codechange",
  "areaname": "Denmark - onshore Zealand and Lolland",
  "extent": {
    "slat": 54.51,
    "nlat": 56.79,
    "llon": 10.79,
    "rlon": 12.87
  }
}