diff --git a/lib/data/models/game.dart b/lib/data/models/game.dart
index 607db0a..42c3b33 100644
--- a/lib/data/models/game.dart
+++ b/lib/data/models/game.dart
@@ -10,6 +10,7 @@ class Game {
   final String description;
   final GameColor color;
   final String icon;
+  final bool deleted;
 
   Game({
     String? id,
@@ -19,6 +20,7 @@ class Game {
     String? description,
     required this.color,
     required this.icon,
+    this.deleted = false,
   }) : id = id ?? const Uuid().v4(),
        createdAt = createdAt ?? clock.now(),
        description = description ?? '';
@@ -39,7 +41,8 @@ class Game {
       ),
       description = json['description'],
       color = GameColor.values.firstWhere((e) => e.name == json['color']),
-      icon = json['icon'];
+      icon = json['icon'],
+      deleted = json['deleted'] ?? false;
 
   /// Converts the Game instance to a JSON object.
   Map<String, dynamic> toJson() => {
@@ -50,5 +53,6 @@ class Game {
     'description': description,
     'color': color.name,
     'icon': icon,
+    'deleted': deleted,
   };
 }
diff --git a/lib/data/models/group.dart b/lib/data/models/group.dart
index c684541..9433087 100644
--- a/lib/data/models/group.dart
+++ b/lib/data/models/group.dart
@@ -8,6 +8,7 @@ class Group {
   final String description;
   final DateTime createdAt;
   final List<Player> members;
+  final bool deleted;
 
   Group({
     String? id,
@@ -15,6 +16,7 @@ class Group {
     required this.name,
     String? description,
     required this.members,
+    this.deleted = false,
   }) : id = id ?? const Uuid().v4(),
        createdAt = createdAt ?? clock.now(),
        description = description ?? '';
@@ -31,7 +33,8 @@ class Group {
       createdAt = DateTime.parse(json['createdAt']),
       name = json['name'],
       description = json['description'],
-      members = [];
+      members = [],
+      deleted = json['deleted'] ?? false;
 
   /// Converts the Group instance to a JSON object. Related [Player] objects are
   /// represented by their IDs.
@@ -41,5 +44,6 @@ class Group {
     'name': name,
     'description': description,
     'memberIds': members.map((member) => member.id).toList(),
+    'deleted': deleted,
   };
 }
diff --git a/lib/data/models/match.dart b/lib/data/models/match.dart
index 2ff02d6..1cb8c60 100644
--- a/lib/data/models/match.dart
+++ b/lib/data/models/match.dart
@@ -16,6 +16,7 @@ class Match {
   final List<Player> players;
   final String notes;
   Map<String, ScoreEntry?> scores;
+  final bool deleted;
 
   Match({
     required this.name,
@@ -27,6 +28,7 @@ class Match {
     String? id,
     DateTime? createdAt,
     Map<String, ScoreEntry?>? scores,
+    this.deleted = false,
   }) : id = id ?? const Uuid().v4(),
        createdAt = createdAt ?? clock.now(),
        scores = scores ?? {for (Player p in players) p.id: null};
@@ -65,7 +67,8 @@ class Match {
               ),
             )
           : {},
-      notes = json['notes'] ?? '';
+      notes = json['notes'] ?? '',
+      deleted = json['deleted'] ?? false;
 
   /// Converts the Match instance to a JSON object. Related objects are
   /// represented by their IDs, so the game, group, and players are not fully
@@ -80,6 +83,7 @@ class Match {
     'playerIds': players.map((player) => player.id).toList(),
     'scores': scores.map((key, value) => MapEntry(key, value?.toJson())),
     'notes': notes,
+    'deleted': deleted,
   };
 
   List<Player> get mvp {
diff --git a/lib/data/models/player.dart b/lib/data/models/player.dart
index 12d17f0..d7e5e33 100644
--- a/lib/data/models/player.dart
+++ b/lib/data/models/player.dart
@@ -7,6 +7,7 @@ class Player {
   final String name;
   int nameCount;
   final String description;
+  final bool deleted;
 
   Player({
     String? id,
@@ -14,6 +15,7 @@ class Player {
     required this.name,
     this.nameCount = 0,
     String? description,
+    this.deleted = false,
   }) : id = id ?? const Uuid().v4(),
        createdAt = createdAt ?? clock.now(),
        description = description ?? '';
@@ -29,7 +31,8 @@ class Player {
       createdAt = DateTime.parse(json['createdAt']),
       name = json['name'],
       nameCount = 0,
-      description = json['description'];
+      description = json['description'],
+      deleted = json['deleted'] ?? false;
 
   /// Converts the Player instance to a JSON object.
   Map<String, dynamic> toJson() => {
@@ -37,5 +40,6 @@ class Player {
     'createdAt': createdAt.toIso8601String(),
     'name': name,
     'description': description,
+    'deleted': deleted,
   };
 }
diff --git a/lib/data/models/score_entry.dart b/lib/data/models/score_entry.dart
index f9c5ff0..42924d3 100644
--- a/lib/data/models/score_entry.dart
+++ b/lib/data/models/score_entry.dart
@@ -2,8 +2,9 @@ class ScoreEntry {
   final int roundNumber;
   final int score;
   final int change;
+  final bool deleted;
 
-  ScoreEntry({required this.score, this.roundNumber = 0, this.change = 0});
+  ScoreEntry({required this.score, this.roundNumber = 0, this.change = 0, this.deleted = false});
 
   @override
   String toString() {
@@ -13,11 +14,13 @@ class ScoreEntry {
   ScoreEntry.fromJson(Map<String, dynamic> json)
     : roundNumber = json['roundNumber'],
       score = json['score'],
-      change = json['change'];
+      change = json['change'],
+      deleted = json['deleted'] ?? false;
 
   Map<String, dynamic> toJson() => {
     'roundNumber': roundNumber,
     'score': score,
     'change': change,
+    'deleted': deleted,
   };
 }
diff --git a/lib/data/models/team.dart b/lib/data/models/team.dart
index f5941c4..2dbe8dd 100644
--- a/lib/data/models/team.dart
+++ b/lib/data/models/team.dart
@@ -7,12 +7,14 @@ class Team {
   final String name;
   final DateTime createdAt;
   final List<Player> members;
+  final bool deleted;
 
   Team({
     String? id,
     required this.name,
     DateTime? createdAt,
     required this.members,
+    this.deleted = false,
   }) : id = id ?? const Uuid().v4(),
        createdAt = createdAt ?? clock.now();
 
@@ -27,7 +29,8 @@ class Team {
     : id = json['id'],
       name = json['name'],
       createdAt = DateTime.parse(json['createdAt']),
-      members = []; // Populated during import via DataTransferService
+      members = [],
+      deleted = json['deleted'] ?? false;
 
   /// Converts the Team instance to a JSON object. Related objects are
   /// represented by their IDs.
@@ -36,5 +39,6 @@ class Team {
     'name': name,
     'createdAt': createdAt.toIso8601String(),
     'memberIds': members.map((member) => member.id).toList(),
+    'deleted': deleted,
   };
 }